Arsenal defenders Laurent Koscielny and Kieran Gibbs will undergo late fitness tests before Sunday's North London derby against Tottenham Hotspur, manager Arsene Wenger told a news conference.
"We [will] make a decision about them tomorrow," Wenger said as his fourth-placed side prepared to host their third-placed bitter rivals.
Premier League leaders Manchester City will make changes to their team for Saturday's visit of Blackburn Rovers after the midweek victory over Porto in the Europa League.
"We'll need to change the team, you must if you play every three days," manager Roberto Mancini, whose side are two points clear of Manchester United, said on the club website.
"I think negotiations are ongoing at the moment," assistant manager Eric Black told reporters. "I don't really know the details and I'm not really in a position to comment further on that, but negotiations are ongoing."
Defender Samba, who has been vocal in his criticism of the club's Indian owners Venky's, had a transfer request turned down last month.
Champions Manchester United are waiting to see if Wayne Rooney will have recovered from a throat infection in time for Sunday's trip to Norwich City.
The striker missed Thursday's Europa League last 32 second-leg defeat by Ajax with the problem.
Chelsea winger Juan Mata is available for Saturday's match at home to Bolton Wanderers despite breaking a finger in Tuesday's 3-1 defeat
