80' Henderson is replaced by Milner, although he is able to walk off the field under his own steam.
78' Henderson is down for the Reds and he may have to make way here. It would be a huge blow for Liverpool to lose their skipper.
77' Costa makes his first appearance since November as he replaces Correa.
76' Henderson bursts forward after combining with Firmino in the box. His effort strikes Partey on the shoulder before deflecting off the Liverpool skipper and out for a goal-kick.
75' Llorente takes a good touch down the right flank to skip past one challenge, but Oxlade-Chamberlain halts his progress with a well-timed challenge.
73' WIDE! Origi digs out a cross from the right inside channel in a crowded penalty area. Henderson guides a strike towards goal on the volley, but the ball drifts just wide of the post.
72' Oxlade-Chamberlain replaces Salah, who has been a tad underwhelming tonight.
71' CHANCE! Lodi lines up a strike to nothing from 30 yards and he connects sweetly with his strike. Alisson scrambles over to his left with a dive and he watches as the ball travels wide of the post.
70' Morata is the man withdrawn rather than Correa. Vitolo replaces the forward in the final third.
68' WHAT A MISS! Savic releases Lodi over the top in the left inside channel and he cuts the ball back for an unmarked Morata. The Spaniard has space and time along with the goal gaping, but he slips at the vital moment and fails to connect with a strike at goal. A huge opportunity is spurned by the Spaniard.
66' Atletico battle for every ball and Lodi and Koke ensure that the visitors are unable to break out from the back.
65' Correa stays down after losing out in a challenge with Fabinho. Time is taken for the forward to receive treatment and he may even make way here.
63' Liverpool are just starting to show the signs of frustration. The home side are not giving them anything to work with in the final third.
61' Robertson plays the ball into space for Origi once more. He can run at Partey in the left inside channel, but the midfielder holds his ground and Origi can only send the ball out for a goal-kick.
60' Robertson tries to send Origi down the left flank. The pace of the ball is just too much for the Belgian and prevents him from flicking a strike past Oblak, who comes a long way off his line. It ends in a goal-kick for the home side.
59' Gomez tries to get ahead of Morata to win possession, but is late on the forward and is booked by the referee.
57' Partey gets a vital boot in to stop Firmino turning in the box after being teed up by Salah. The pressure from Liverpool has been unrelenting for the past 10 minutes.
55' Liverpool recycle possession with ease in the final third, but the red and white shirts remain disiciplined in their shape to keep them at bay.
53' CHANCE! Salah heads wide of the post. Gomez brings the ball forward and floats a perfect cross into box for the run of the Liverpool winger. He connects with a free header from 10 yards out, only to glance his effort wide of the target.
52' Liverpool fail to find the precise delivery needed to create the opening as Alexander-Arnold and Origi see their crosses cleared with ease.
51' Henderson goes down under pressure from Saul and wins a free-kick on the right flank. Alexander-Arnold needs to be better from dead-ball situations for the visitors.
50' Correa breaks into space down the right flank and he has the opportunity to deliver a low ball across the face of goal, but Alisson is there to gather in the middle.
49' The home side cut open Liverpool at the back down the right flank. Llorente surges into the inside channel and slides the ball back for Vrsaljko to strike, but he fails to connect on his right boot, spurning the opening.
46' Llorente comes on for Lemar at the break for the home side.
46' Substitution Sadio Mané Divock Okoth Origi
45' + 2' HALF-TIME: ATLETICO MADRID 1-0 LIVERPOOL
45' + 1' Partey spots Alisson off his line from the resulting free-kick and goes for goal from the half-way line. However, his effort travels way over the bar.
45' + 1' Mane and Vrsaljko collide for the third time of the half. The Atletico players want the Liverpool man to receive a second booking, but the referee is adamant and speaks to Koke to bring his team-mates under control.
42' Koke tries to nod the ball towards Correa in the final third, but Van Dijk is there in a flash to break up the attack.
40' Yellow card Sadio Mané
38' The visitors work the ball across the pitch to try to open up space in the Atletico defence. However, once again the home side hold firm to keep Liverpool at bay.
36' Liverpool catch Atletico cold at a corner on the right and Fabinho feeds the run of Alexander-Arnold. He sends a dangerous ball across the face of goal, but there's no player from the visitors there to connect at the back post.
35' BLOCK! Felipe produces a vital block to deny Salah. Firmino twists and turns his way past two defenders in the box open up the Atletico rear guard. He stabs the ball towards Salah in the middle, who fires at goal first time. His effort looks goalbound, but Felipe puts his body on the line to divert it over the bar.
34' Lemar latches on to Felipe's ball over the top and controls to shape for a strike. However, he blazes his effort well over the bar from the left inside channel, and the Frenchman is relieved to see the offside flag raised.
32' Atletico are remaining compact in their shape amid pressure from the visitors. Klopp's men have yet to test Oblak with an effort on target.
30' Fabinho has space to line up a drive at goal, but the midfielder lifts his effort harmlessly over the bar.
29' WIDE! Firmino combines with Robertson to tee up the Scot for a strike in a central position. Robertson has to go with his right foot, and he can only skew his attempt wide of the right post.
25' SAVE! Van Dijk fails to clear his lines, directing his header straight towards Morata in the left inside channel. The forward produces a neat turn to beat the challenge of Fabinho before firing a low strike at goal. However, Alisson makes a sharp stop with his feet to deny Morata.
23' Fabinho wins a free-kick on the right flank, but the delivery into the box from Alexander-Arnold fails to beat the first defender, allowing the home side to clear. The Liverpool right-back has not been at his best thus far.
22' Lodi gets away with a slip on the edge of the box as he nudges the ball with his hand in the process. Liverpool cannot capitalise, winning a throw-in only down the right flank.
21' Liverpool move their line forward after repelling an initial corner from Koke. Fortunately for them, the second delivery from the Spaniard travels straight through to Alisson.
20' Lodi sends a perfect cross into the box from the left flank for the home side. Morata is there at the back post, but Robertson on the stretch just does enough to guide it out for a corner.
18' Liverpool are upping the ante to keep the home side compressed inside their own half. There's no way out for Los Rojiblancos at the moment.
17' Atletico have never previously lost a match in which Saul has scored in all competitions (P36 W32 D4 L0 before tonight).
16' Henderson feeds the run of Salah in the right inside channel, but Felipe does well under pressure to win possession before clearing his lines.
15' Savic makes an important interception for the home side at the back to break up Robertson's pass towards Wijnaldum on the charge.
14' Alexander-Arnold and Henderson combine down the right flank, but once again his range is off with a cross into the box, sending his delivery over the bar.
11' Liverpool make positive ground in the Atletico half, but Alexander-Arnold ends the attack by slicing his cross over the bar from the right flank.
10' Saul's opener (03:46) is the earliest Liverpool have conceded in the Champions League since Gabriel Jesus scored past them in the second minute for Man City in April 2018; nine of Saul's 10 Champions League goals have come in the first half.
9' Atletico have not allowed the visitors to settle into the game. It has been an impressive start from Simeone's men to put Liverpool on the back foot.
4' Van Dijk concedes a corner, keeping the pressure on the visitors in the early stages.
4' GOALLLLLLLLLLLLLLLLLLLLLLLLLL!!! SAUL PUTS ATLETICO AHEAD!!! 1-0!!! The home side take the lead in the tie as Saul converts from close range. Koke puts his delivery on the spot from the corner on the right flank. It strikes Firmino on the boot and travels towards the near post. Saul reacts to the loose ball and stabs his effort past Alisson from six yards out to put his side in front.
3' Lodi collects on the left flank and surges past Alexander-Arnold. He whips a dangerous cross towards Morata, but it just evades the head of the forward in the middle.
2' Van Dijk looks for the long ball over the top for Alexander-Arnold, but the ball skips off the pitch and travels behind for a goal-kick.
1' We're underway at the Wanda Metropolitano.