Hull City tried to sign Dusan Kuciak from Legia Warsaw last summer.
Arsene Wenger has also updated reporters on the status of Santi Cazorla and Danny Welbeck.
Philippe Senderos has left Aston Villa by mutual consent.
Slaven Bilic says the deal for Emmanuel Emenike is alive, but complicated.
The 32-year-old has spent the last six weeks on the sidelines.
The Ivorian club captain has been linked with Sunderland this week.
Everton were defeated by Manchester City in the League Cup.
West Ham United face a race against time to get a new striker signed and registered to play against Liverpool in the FA Cup.
The teenager will join the Bundesliga club in 2017.
Alan Pardew has recently signed Emmanuel Adebayor at Crystal Palace, but he tried to snap up the striker while at West Ham United and Newcastle United.