Chelsea have put themselves in a strong position after a 2-nil win in the first leg of their Champions League quarter-final with Porto last night.
Away goals from Mason Mount and Ben Chilwell have put the London club in a commanding position.
But after suffering a shock defeat to West Brom last Saturday, boss Thomas Tuchel knows anything could still happen in the second leg.
Chelsea's 'home leg' will also be played in Seville next week.
Meanwhile, Paris Saint-Germain won 3-2 at Bayern Munich in the night's other game.
Elsewhere, Manchester United and Arsenal both look to take a step towards the last-4 of the Europa League this evening.
2017 winners United are in Spain to face Granada in the first-leg of their quarter-final and have been boosted by the news Marcus Rashford is fit to play in the match.
Arsenal entertain Slavia Prague - who have knocked out Leicester and Rangers in the previous two rounds.
Both games kick off at 8pm.