Ianis Hagi, who scored three goals during a loan spell at Rangers, said he shunned interest from other clubs to sign a permanent deal.
Barcelona revealed two signings on deadline day, Atletico brought in a familiar face, while Juventus' Emre Can moved to Borussia Dortmund.
Sander Berge, who had been linked with Liverpool and Tottenham, has signed for Sheffield United from Genk in a club-record transfer.
Mbwana Samatta will look to fill the void left by Wesley after joining Aston Villa.
Napoli president Aurelio De Laurentiis is set to meet Carlo Ancelotti for talks over the coach's future at the Serie A club.
Teenage goalkeeper Maarten Vandevoordt had a Champions League debut to forget as Genk lost heavily away to Napoli in Group E.
At 17 years and 287 days, Genk's Maarten Vandevoordt has become the Champions League's youngest goalkeeper.
Liverpool have left it late to progress from Group E, and Erling Haaland will be aiming to make the Champions League holders pay on Tuesday.
Napoli are reportedly ready to call time on Carlo Ancelotti's time at the club and the veteran coach said he is "ready" to be sacked.
Salzburg can cause an upset when they host Liverpool next month and Erling Haaland feels they are capable.