German newspaper Bild said that fans seated behind the commentators punched them and pulled a headset off one of them during Thursday night's first leg, which Frankfurt won 2-1
Both clubs are bidding in what would be their biggest match in decades. Frankfurt's last final came when it won the UEFA Cup in 1980. West Ham's last game was the 1976 Cup Winner's final.
Sevilla have the incentive of trying to reach a final that will be played in their own stadium, the Ramon Sanchez Pizjuan, on May 18.
After being thumped 4-0 by Liverpool in their season opener, West Ham have lost to Bournemouth and Arsenal despite taking the lead in both games through Marko Arnautovic.
Argentina midfielder Javier Mascherano calls time on career after painful defeat to France in FIFA World Cup
Argentina midfielder Javier Mascherano made his international debut in 2003 and went on to appear 147 times for his country.
In their first outing since beating Porto 5-0 in the Champions League 10 days ago, Liverpool moved up to second in the Premier League with a 4-1 thrashing of West Ham on Saturday.
Arsenal are only one point off fourth place but did not look like a side going places despite enjoying the majority of possession against West Ham.
Manchester City moved eight points clear at the top of the Premier League as David Silva's superb late strike capped a dramatic 2-1 victory over West Ham.
The hosts fell behind early on at the London Stadium to a goal from Marc Albrighton before Cheikhou Kouyate equalised on the stroke of half time.
New West Ham manager David Moyes said the club need to make a habit of winning at the former Olympic Stadium.
Moyes largely escaped the vitriol of the fans during his first game in charge, a 2-0 loss at Watford on Sunday. Instead, that was directed at his players and the club's hierarchy.
Will Hughes scored his first goal for Watford before setting up Richarlison to end a three-match losing streak for the Hornets.
David Moyes faces a tough task to turn around the fortunes of the London club, mired in the Premier League relegation zone.
Moyes didn't last a year at any of his previous three clubs — Manchester United, Real Sociedad and Sunderland — in a bruising period since 2013 that tarnished the reputation of a manager.
West Ham manager Slaven Bilic is under even more serious pressure after Ronald Koeman's sacking by Everton.
West Ham manager Slaven Bilic appeared resigned to his fate on Friday following his side's woeful performance in a 3-0 home defeat by Brighton.
West Ham's Carroll, Reid and Ayew were shown yellow cards, while Eric Dier and Fernando Llorente were booked for Spurs.
Romelu Lukaku can attack his first Manchester United season under no pressure after scoring two goals on his EPL debut.
United's defense was given an easy ride with Matic stationed in front of them, and Pogba could also thrive this season.
Jurgen Klopp's side took the lead when Coutinho's sublime pass was converted by Daniel Sturridge in the first half.