Viola take advantage, Lyon cruise
Fiorentina edged an advantage with a 1-1 draw against Juventus in their Europa League last-16 clash, while Lyon, Porto and Valencia all won.
Gomez, who came off the bench in the 67th minute, cancelled out Arturo Vidal's third-minute opener as Thursday's first leg in Turin .
stunned city rivals Sevilla with a 2-0 win despite being outplayed for much of the derby.
Sevilla had won their previous four games in all competitions and were six unbeaten, and they dominated Thursday night's game.
Yet they somehow came away facing an imposing second-leg test next week after Leo Baptistao's first-half header and Salva Sevilla's strike gave Betis victory.
Valencia have one foot in the quarter-finals following a at Ludogorets.
The Spaniards went 1-0 up through Antonio Barragan after five minutes but looked in trouble when Seydou Keita was sent off in the 25th, giving away a penalty in the process.
Diego Alves kept out Roman Bezjak's spot-kick, though, and the visitors went on to add more goals through Federico Cartabia and Philippe Senderos.
Ludogorets then had Juninho Quixada dismissed to cap a dismal night.
Lyon will be expected to reach the last eight following a over Plzen.
Tomas Horava took advantage of some poor defending from the Ligue 1 side to claim an early lead before the score was levelled by Gueida Fofana 10 minutes later.
Alexandre Lacazette gave Lyon the lead early in the second half before Arnold Mvuemba and Fofana wrapped up the win.
Jackson Martinez scored the only goal in the 57th minute as hosts Porto claimed a over Napoli.
AZ Alkmaar put themselves in the driving seat in their tie against Anzhi Makhachkala, in Holland thanks to a first-half penalty from Aron Johansson.
Basle ended Salzburg's 14-game winning streak in all competitions as they played out a in the first leg at St Jakob Park.
Benfica are also on course for the next round thanks to a over Tottenham at White Hart Lane.
Rodrigo's goal on the half-hour gave the Portuguese visitors a lead which was doubled by Luisao after 58 minutes.
Christian Eriksen pulled a goal back from a free-kick but Luisao struck again to put the result beyond doubt.
Take a look at the best pictures from the night's games in our