Olympiacos will face Fiorentina in the Europa Conference League final after an Ayoub El Kaabi double secured a 6-2 aggregate win over Aston Villa

· Aston Villa travel to Greece to face Olympiacos in the Europa Conference League semi-final· Unai Emery's side lost the first leg 4-2 at Villa Park last week· The two sides are clashing for only the second time in history on Thursday nightAston Vill

Unai Emery says Thursday’s Europa Conference League clash with Olympiacos is Aston Villa’s “biggest challenge” of the season.Villa are 4-2 down after a shock defeat in the first leg of the semi-final tie at Villa Park last week

Verdict: Ayoub El Kaabi to score anytimeBest Odds: 21/10Seeking a Europa Conference League comeback on Thursday night, Aston Villa will travel to the Karaiskakis Stadium when they meet Olympiacos for their second-leg showdown

· Aston Villa preparing for first European semi-final since 2003· Both teams progressed into semi-finals on penalties· Olympiacos led by former Sevilla manager Jose Luis MendilibarAston Villa are readying themselves for their first European semi-fina

Competition: Greek Super LeagueMarket: Olympiacos winOdds: 1/2 @ BetUSLooking to skyrocket their way back into the European spots, Olympiacos will travel to the Kleanthis Vikelidis Stadium when they meet Airs on Wednesday evening