The Frenchman is hopeful Juan Antonio Pizzi's men can turn the tie around in next week's return after Thursday's 2-0 first-leg defeat
Jeremy Mathieu is confident Valencia can still reach the Europa League final despite their 2-0 defeat in the first leg of their semi-final tie with Sevilla.
First-half goals from Stephane M'Bia and Carlos Bacca saw Sevilla emerge victorious at the Ramon Sanchez Pizjuan, as Valencia failed to capitalise on their own clear-cut openings, with Jonas and Eduardo Vargas spurning great chances late on.
Juan Antonio Pizzi's men were beaten 3-0 in the first leg of the quarter-final with Basel before an astounding 5-0 triumph in the return at Mestalla sent them through, and Mathieu believes his side are fully capable of repeating that feat against Sevilla.
"All of us will need to be at our best to try and turn this tie around. We did it against Basel and I think we're capable of doing it again," the defender told the official Uefa website.
"When the ball just won't go in it's hard to tak,, but at Mestalla it will.
"That's what happened against Basel, it was an incredible night and Thursday has to go the same way."
The return in Valencia is scheduled to take place on May 1.
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