Chelsea take on Valencia in Spain in the Champions League group stages for a chance to secure qualification into the knockouts.
A win for Frank Lampard's side will secure progression, whilst a draw would take it to the final matchday with three teams in contention to head into the last-16.
But a defeat would see the Blues have their qualification hopes taken out of their hands with Valencia and Ajax taking the hot-seat.
Follow it all here on SI.com for the Champions League clash between Valencia and Chelsea.
Team news is in!
1' We are underway!
2' Reece James whips one in and finds Willian, but the Brazilian can only head it over the bar. Big chance.
6' Jorginho the first to be in the book as he is shown a yellow for a foul after the Torres broke through.
9' James plays a dangerous ball across the box but nobody is there to latch onto the end of it.
11' Jorginho tries to find Pulisic over the top, but the American just can't get there.
12' Willian takes a free-kick but it's straight at the keeper. Danger averted for the hosts after Pulisic was fouled.
14' James finds Tammy Abraham in the box with an excellent ball but he can't steer it on target.
Referee is continuing to give the hosts free-kicks. Valencia going down extremely softly.
19' Maxi Gomez misses an absolute sitter. He air-shoots it and completely misses the cross at the back post. Huge let off for Chelsea.
22' Soler heads it straight at Kepa. Tame effort.
29' Kepa denies Maxi Gomez. Again at the back post - Chelsea need to wake up in Spain. Defence all over the place.
31' Pulisic fizzes a delivery into the box, but no-one is there.
32' Wass booked after a foul on Mateo Kovacic.
33' Cillessen claims a Willian delivery. Chelsea have been good from out wide with deliveries into the area.
34' Kante runs at the Valencia goal, but misplaces his pass. Chelsea keep the ball, but Abraham is thwarted by the hosts' back-line.
36' Kepa passes it into no-mans-land but gets away with it.
37' James pulls it back to Kante, but he lashes at it and it sails over.
Chelsea need more creativity in the midfield going forward. Mason Mount needs to be brought on by Frank Lampard.
38' Cillessen makes an outstanding save to deny Abraham.
40' GOAL! Valencia take the lead.
Rodrigo finds Soler in the box, and Chelsea are behind. Chelsea are in trouble. A lot to do now.
41' GOOOOOOALLL! Mateo Kovacic levels the scores!
His first ever goal for Chelsea brings it back to all square. A quick-fire response from the visitors. Into the bottom corner, Cillessen can't keep him out.
A huge response from Frank Lampard's men after conceding 1 minute and 47 seconds prior.
44' Kovacic should have another, but hits it straight at Cillessen.
HT: Valencia CF 1-1 Chelsea
Tammy Abraham is replaced by Michy Batshuayi.
46' Back underway for the second-half - Valencia CF 1-1 Chelsea.
49' Pulisic scores, but his effort is ruled out for offside.
He stabs it in, but the flag is raised.
VAR is checking...
GOOOOOALLLL! PULISIC IS RULED ONSIDE. CHELSEA LEAD.
55' Azpilicueta booked.
57' Rodrigo lobs Kepa but it goes over the bar. Huge chance missed.
63' Valencia are awarded a penalty.
KEPA SAVES IT - IT REMAINS 2-1!
65' Gaya whips it into a dangerous area but Rodrigo can't get onto the end of the delivery.
67' SUB: Gameiro replaces Costa.
68' Batshuayi is in. Willian runs alongside him. But the Belgian fluffs his pass. Luckily for him, the flag is raised - belatedly.
With the way this game is going - end-to-end - Chelsea really need a third goal.
71' Emerson on for Jorginho. Chelsea switch to three at the back.
73' Kante now booked for a 'foul'.
77' Kepa booked for time-wasting.
SUB: Soler is replaced by Lee for the hosts.
79' Mason Mount comes on for Willian.
80' Azpilicueta blocks Parejo's effort on the edge of the area.
81' GOAL! Valencia equalise. 2-2.
Wass equalises with ten minutes to go with a freak goal.
Kepa Arrizabalaga should be doing better. A cross turned shot sees the scores level.
Seven minutes to go - it is crucial Chelsea do not lose.
86' Gabriel Paulista booked for a foul on Mount.
The tactical switch from Frank Lampard hasn't paid off tonight at the Mestalla.
89' Cillessen denies Batshuayi. An excellent save to deny Chelsea a late goal after a deflection.
Seven minutes added on.
95' Valencia nearly had a winner through Rodrigo. He curls it just over.
96' Rodrigo has another chance but misses an absolute sitter.
FT: Valencia CF 2-2 Chelsea
It ends all square.
Qualification remains in Chelsea's hands heading into the final game against LOSC Lille.