Open Extended ReactionsThe summer transfer window has been open for business since June 16 and clubs in Europe's major leagues can do deals until 2 p.m. ET (7 p.m. BST) on Sept. 1, but some leading players risk becoming high-profile "untransferables" in the weeks ahead. Darwin NúñezThe Liverpool forward is available for transfer this summer after spending the majority of last season as a bit-part player for Arne Slot's Premier League champions. Gab & Juls debate the future of Jack Grealish after reports of him being left out of Man City's Club World Cup squad. A return of just one goal in 28 appearances -- mostly as a substitute -- during a seasonlong loan at Arsenal ensured no prospect of a permanent deal at the Emirates.