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Defending champions Chelsea could be in trouble if striker Diego Costa is unavailable for long, former Tottenham manager has Harry Redknapp.
Spain striker Costa, who injured his hamstring during pre-season and missed the Community Shield defeat to Arsenal on Sunday, is a doubt for Chelsea'sPremier League opener against Swansea City.
"If Costa is injured a lot and is going to be missing, that's the scary part - can they (Chelsea) get away without him?" Redknapp, who quit as Queens Park Rangers manager in February, said on Twitter.
"If Costa does pick up injuries, and it seems his hamstring isn't great at the moment, one of (Loic) Remy and (Radamel) Falcao has got to carry the baton and do the job and whether they can is the question mark.
"Maybe Falcao can do the job, Jose's placed his faith in him. Jose (Mourhino) can lift people and improve people and if he can get the best out of him maybe they'll be ok," Redknapp added.
Show all 24 1 /24Arsenal 1 Chelsea 0 player ratings Arsenal 1 Chelsea 0 player ratings ARSENAL: Petr Cech Up against his former side, didn't even have to make a save in the first half. When finally called upon by a great Oscar free-kick, was able to match it. 7
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Arsenal 1 Chelsea 0 player ratings Hector Bellerin Too casual at times, giving away the ball on the edge of his own box and failing to adequately see the it out. Weakest link at the back. 4
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Arsenal 1 Chelsea 0 player ratings Laurent Koscielny Strong and authoritative at the back, getting blocks in and helping create an air of assurance during periods of Chelsea pressure. 7
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Arsenal 1 Chelsea 0 player ratings Per Mertesacker Used his height to good effect to intercept balls and win battles with first Remy and then Falcao in the second half. 6
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Arsenal 1 Chelsea 0 player ratings Nacho Monreal Limited the threat on the left of Arsenal's defence, blocking a few crosses from Ivanovic. Got forward when he could and nearly scored. 6
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Arsenal 1 Chelsea 0 player ratings Francis Coquelin A menace in midfield, breaking up play whether through tough tackling or fouling his opponents. Both were effective but his style earned him a booking. 8
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Arsenal 1 Chelsea 0 player ratings Santi Cazorla Well involved, particularly in the first period when he displayed incredible ability with a no-look volleyed pass out to the wing. 7
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Arsenal 1 Chelsea 0 player ratings Aaron Ramsey Playing in the central role he covets the Wales international showed awareness, eye for a pass and ability to make a tackle. Shot into side netting from a tight angle. 6
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Arsenal 1 Chelsea 0 player ratings Alex Oxlade-Chamberlain Cut inside before hitting an unstoppable shot into the roof of the net with his left foot. Showed great pace and awareness throughout a man-of-the-match performance. 8
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Arsenal 1 Chelsea 0 player ratings Mesut Ozil Displayed brilliant touch and awareness and had a hand in Chamberlain's goal with a visionary pass across field in the build-up. 7
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Arsenal 1 Chelsea 0 player ratings Theo Walcott Playing in a central role looked sharp and eager to impress but had few opportunities to do so in front of goal. Claimed assist for Chamberlain goal. 6
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Arsenal 1 Chelsea 0 player ratings From the bench: Olivier Giroud Strength immediately providing a different element to Walcott. Shot over the bar when probably should have done better. 6
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Arsenal 1 Chelsea 0 player ratings CHELSEA: Thibaut Courtois Could do little about Chamberlain's rocket of a goal. Did all that was required to keep the score at 1-0 including fine injury-time save from Gibbs. 6
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Arsenal 1 Chelsea 0 player ratings Branislav Ivanovic Saved his side from going 2-0 down in the first half with a brave header off the line with Monreal ready to pounce. 6
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Arsenal 1 Chelsea 0 player ratings Gary Cahill Dominated the aerial battles but wasn't overworked by Walcott. Solid display from the England international. 6
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Arsenal 1 Chelsea 0 player ratings John Terry Strong early tackle on Walcott sent out a message then used experience to keep things tidy for Chelsea. For once didn't go the distance, replaced late on. 6
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Arsenal 1 Chelsea 0 player ratings Cesar Azpilicueta Forced to take a booking when beaten for pace by Chamberlain, who gave him a torrid afternoon that he will want to forget before going off after 69 minutes. 3
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Arsenal 1 Chelsea 0 player ratings Nemanja Matic Won numerous tackles in the middle of the park and enabled the more creative players to operate around him. 6
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Arsenal 1 Chelsea 0 player ratings Cesc Fabregas Given time on the ball in deep positions from where he pulled the strings for Chelsea, including brilliant passes for Falcao and Hazard. 7
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Arsenal 1 Chelsea 0 player ratings Ramires Should have scored but headed over the bar with a header from six yards. 'Friendly' nature of match passed the Brazilian by with nasty fouls on Cazorla and Ozil. 5
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Arsenal 1 Chelsea 0 player ratings Willian Arguably Chelsea's best player, making bursting runs from midfield and creating opportunities for his team-mates. Great energy. 7
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Arsenal 1 Chelsea 0 player ratings Eden Hazard Shocking miss by Hazard's standards when put in on goal by Fabregas, blazing the ball over Cech's goal from close range. Was kept well shackled by Arsenal. 5
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Arsenal 1 Chelsea 0 player ratings Loic Remy Standing in for the injured Diego Costa, the Frenchman provided a brilliant pass that Ramires should have converted. Was offside too often. Taken off at half-time. 5
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Arsenal 1 Chelsea 0 player ratings From the bench: Radamel Falcao Offered more of a target than Remy for Chelsea's midfielders to aim at, eager to get in good positions and make an impact. No clear opportunities. 6
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Chelsea take on Swansea at Stamford Bridge in the late kick-off on Saturday.
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