Gunners sweat over Oxlade-Chamberlain
Arsenal face an anxious wait to find out the extent of the hamstring injury to England midfielder Alex Oxlade-Chamberlain.
The 21-year-old, who had just returned to the side following a groin problem, was substituted during the second half of Monday night's FA Cup quarter-final win at Manchester United, where he had earlier set up Nacho Monreal's opening goal.
Manager Arsene Wenger confirmed the midfielder was set for a scan but the prognosis would not be determined until later in the week, although it is now unlikely Oxlade-Chamberlain will feature in Saturday's Premier League game against West Ham.
"Chamberlain has a hamstring strain, the only thing we don't know is how bad it is because usually the scans are only done 48 hours after the accident. That will be done today (Wednesday)," Wenger said.
Wenger added midfielder Jack Wilshere was "progressing well" following minor surgery to removes studs from pins in his ankle, and Mathieu Flamini had resumed full training after a hamstring problem, so comes into contention for Saturday.
There was also positive news on centre-back Gabriel Paulista, who limped off against QPR with a hamstring strain but is expected back training "on Sunday or Monday".
Wenger believes the victory at Old Trafford, secured by a goal from former United striker Danny Welbeck, can have a positive impact for the remainder of the campaign.
The Gunners boss, though, accepts recent performances have drained his squad physically, and so will have some decisions to make as he looks to keep the players fresh for both the West Ham match and the second leg of their Champions League tie at Monaco, where Arsenal will be out to overturn a 3-1 deficit.
Theo Walcott could come back into contention, having again been left on the bench at United.
"We were at a high level of fatigue because we played against Monaco, Everton, QPR, Manchester United, all very physical games," said Wenger.
"I will have to test medically, physically, how the players are on Friday, and I will make my decision then.
" The big priority is of course West Ham."
German forward Lukas Podolski, meanwhile, has indicated his intention to return to Arsenal in the summer, having failed to make an impression on a loan spell at Inter Milan.
The World Cup winner said: "The chapter is not closed with Arsenal, because there is no purchase option.
"I was the first person to clear things up in the talks with Inter and say I didn't want any kind of clause that would have let them purchase my contract rights."