David Luiz believes Chelsea have shown great spirit in the way they have battled back from deficits in their last two matches.
The Blues have made life hard for themselves in recent weeks, conceding two early goals against Manchester United in their FA Cup quarter-final and losing the first leg of their Europa League tie against Steaua Bucharest 1-0.
However, they fought back against United to draw 2-2 and force a reply, while a 3-1 victory in the second leg against Bucharest was enough to send them into the quarter-finals.
Rafael Benitez's side, currently fourth in the table, host West Ham on Today looking to keep up the pressure on Tottenham in third. They are 9.50 to win 3-0, and are 2.20 to keep a clean sheet against the Hammers.
"Against Steaua Bucharest on Thursday night I looked into the eyes of my team-mates at half-time and I could see they could score more goals and we could win this game," said Luiz, who is 17.00 to score first on Today.
"By looking people straight in the eye, that is the time you can see them most honestly.
"And even though we had just conceded a goal and were feeling bad, I knew that we had the strength to go back out and win the game.
"Against Manchester United in the FA Cup last Sunday, they scored two goals in the first 11 minutes and might have killed the game.
"But Chelsea showed a lot of quality to come back from that situation."
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