Reports suggest someone will be brought in to 'ease the burden' on Arsene Wenger.
Perez has made just 2 Premier League starts since signing last summer.
Wilshere will enter the final year of his contract at the end of the season.
Sanchez has been linked with a summer exit from the Emirates Stadium.
Xhaka joined Arsenal last summer and is contracted until 2021.
Germany World Cup winner says talks have been held with the Gunners over an extension.
Dutchman has been mentioned as a successor to Andries Jonker who joined Wolfsburg.
Arsene Wenger says all three are uncertain for Saturday's FA Cup tie against Lincoln.
Gunners boss is facing an increasing backlash from his club's fed-up supporters
Holloway says it is almost impossible to manage a 'selfish' player like Sanchez.
Ozil, Sanchez and Oxlade-Chamberlain will enter the final year of their contracts this summer.
England forward claims the Gunners 'can't be fighting each other' as issues worsen.
Sanchez walked out of training midway after clashing with a teammate.
Gunners suffered humiliating 10-2 aggregate defeat to Bayern Munich on Tuesday.
Welbeck pulled out of the Arsenal starting XI as he was unwell just prior to the start.
Bayern's five goals came after Laurent Koscielny was sent off in the 54th minute.
Gunners suffer repeat of record European defeat but Wenger refuses to turn on his team.
First half spirit is replaced by familiar sinking feeling for the Gunners in the Champions League.
Arsenal emphatically dumped out of the Champions League.
Sanchez was not included in Arsenal's starting XI in their 3-1 defeat to Liverpool.
Sanchez, 28, was surprisingly left out of Arsenal's starting line-up against Liverpool.
Niall Quinn expects the Frenchman to sign a new deal - and urges Sanchez to follow suit.