Teens Youri Tielemans and Kasper Dolberg were among the weekend's big movers, but it was Ander Herrera who made the biggest leap. Who has found form before the second legs?
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Which UEFA Europa League players have shown form during the weekend's domestic fixtures? Check out the big movers and shakers in the FedEx Performance Zone.
15: Youri Tielemans (Anderlecht)
Anderlecht opened up a seven-point lead in Belgium with a 1-0 victory over Oostende, and midfielder Youri Tielemans put in an exemplary performance. The Belgian provided the assist for the only goal of the game, created five other chances and delivered eight crosses for team-mates.
44: Sofiane Hanni (Anderlecht)
Another Anderlecht player on the rise, Hanni breaks into the top 50 as he scored the only goal of Sunday's win. The Algerian was unlucky not to add to his tally – he was a threat throughout and registered four shots, created two other chances and embarked on seven dribbles.
55: Ander Herrera (Manchester United)
Herrera leaps 42 places thanks to a superb display against Premier League leaders Chelsea. The Spaniard was the provider for Marcus Rashford's opener and grabbed the second himself. He also made four interceptions and four clearances.
56: Daniel Caligiuri (Schalke)
Schalke have struggled in the Bundesliga of late but one player whose form has not dipped is Caligiuri. The Italian was Schalke's standout player in Sunday's last-minute defeat by Darmstadt, creating three chances, winning three aerial duals, putting in three crosses and earning a penalty.
65: Kasper Dolberg (Ajax)
There were many stellar performances in Ajax’s 5-1 demolition of Heerenveen, and Dolberg certainly stakes a claim to being the chief tormentor. The Danish striker earned and dispatched a penalty, registered an assist and had three other shots on goal. He only made a solitary unsuccessful pass all match.