The Arsenal manager is not sure whether the injured striker will be fit for next month's FA Cup final against Manchester United.
Liverpool opened up a seven-point gap at the top of the English Premier League with a 1-0 win at Brighton & Hove Albion on Saturday, while Arsenal's poor away form continued with a 1-0 defeat at West Ham United.
Thierry Henry and Sol Campbell will miss Arsenal's FA Cup semi-final against Blackburn Rovers due to injury
Arsenal's top scorer Thierry Henry has been ruled out of their FA Cup semi-final against Blackburn Rovers on Saturday due to a groin injury.
Former Australia all-rounder Shane Watson has urged selectors to be patient with the rookies in Steven Smith's team as they battle to cement places in the wake of a string of retirements.
The Portuguese forward, who also scored a treble in the quarter-final against Bayern Munich at the Santiago Bernabeu, and five goals across that tie, is revelling in the central striker's role he has adopted this season.
A Millwall victory would be the biggest upset since Sunderland beat Leeds United in the 1973 final.
Here, Reuters Sport highlights five reasons why last season's double winners have collapsed.
Mumbai Indians captain Rohit Sharma sustained a fracture in the middle finger during the second One-Day International against England at Cardiff.
Manchester City stumbled to the most unexpected defeat of the Premier League season on Saturday before neighbours Manchester United began their brave new world under Ole Gunnar Solskjaer with a glorious reminder of long-forgotten attacking swagger.
The T20I and ODI squads, captained by Eoin Morgan, feature five players, Moeen, Jos Buttler, Steven Finn, Ben Stokes and Mark Wood, who were involved in the Ashes.
Aus coach Darren Lehmann refused to blame selection errors and concedes being outplayed by England
Chelsea striker Fernando Torres will not be fit to join the Spain squad next week after injuring his knee during the Champions League win over Steaua Bucharest, manager Jose Mourinho has said.
Struggling England batsman Ian Bell is backing himself to come good at number three in this week's third Ashes Test against Australia at Edgbaston.
The Wales winger has been ruled out of the start of his country's 2006 World Cup qualifying campaign.
News of all that's transpired on and off the football field.
Belgium's Euro 2016 title credentials were boosted by a big win over Hungary in the last 16 on Sunday but before they can even think about reaching the final they face a tricky rematch with recent conquerors Wales.
Champions Manchester United travel to Swansea City for their first Premier League match under new manager David Moyes, while Manuel Pellegrini's Manchester City are at home to Newcastle United on August 17.
IMAGES from the match played between Bangladesh and West Indies in their ICC World Cup match in Taunton on Monday
News of all that's transpired on and off the football field
Although Steve Smith was named man of the match after scoring 273 runs it was Australia's rejuvenated pace bowlers who made the biggest statement in their side's brutal mauling of England in the second Ashes Test.
Australia ripped out England's top order to take a vice-like grip on the second Ashes Test after completely dominating the second day at Lord's on Friday.
29-year-old Derbyshire left-arm seamer Mark Footitt, who has taken 32 wickets for his county in Division Two this season, was handed a place at the training camp, which begins on June 27, ahead of Yorkshire all-rounder Adil Rashid.
Indian limited-overs skipper Mahendra Singh Dhoni has identified consistency as the key to retain the ICC Champions Trophy they had won in 2013.
Middlesbrough are through to the League Cup final with a tense 2-1 victory in their semi-final, second leg match.
Michael Clarke's touring side will attempt to win the urn on English soil for the first time in 14 years and Alastair Cook's hosts will try to win back the trophy following their crushing 5-0 defeat in the last series Down Under.
Cristiano Ronaldo showed nerves of steel to score an injury-time penalty and send holders Real Madrid into the semi-finals of the Champions League in extraordinary circumstances as they lost 3-1 to Juventus on Wednesday but won a thrilling tie 4-3 on aggregate.
Champions Manchester United's hopes of retaining their English Premier League title suffered another major setback on Saturday when they were beaten 1-0 at Old Trafford by a composed Newcastle United.
In the dying minutes of their Champions League semi-final second leg against Real Madrid, a thunderstorm rolled in and drenched Atletico Madrid's Vicente Calderon stadium.
Real Madrid survived an early Atletico Madrid onslaught to reach the Champions League final 4-2 on aggregate on Wednesday and set up a mouth-watering clash against Juventus.
Arsenal forward Theo Walcott has warned resurgent arch-rivals Tottenham Hotspur they are travelling across North London for their eagerly-anticipated FA Cup third round tie at a bad time.
Australia Test skipper Michael Clarke's will captain the Melbourne Stars in Australia's Big Bash League for the next two seasons after not playing Twenty20 for three years.
Wes Morgan's 90th-minute header earned 10-man Leicester City a 2-1 victory over relegation-threatened Burnley at Turf Moor in the Premier League on Saturday.
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Ravichandran Ashwin's showing in the shorter versions of cricket have been comparatively better than that in Tests. The Tamil Nadu spinner attributes it to the time spent in the nets with his personal coach.
Images from the EPL matches played on Saturday
