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Arsenal are in with as good a chance of winning the Premier League title as they've been in for years, though the Gunners once again look at risk of throwing it all away. Arsène Wenger's side have picked up just two points from their last three league matches, and have slipped below both Manchester City and Leicester City in the league table. That said, their deficit to the league leaders is only three points, and they'll be looking to arrest their slide at home to Southampton on Tuesday.
Ronald Koeman's South Coasters have been in strange form so far this season, and no one seems to know quite whether they're actually any good. That said, they head into this match on the back of three straight victories, having beaten Watford, West Bromwich Albion and Manchester United without conceding a single goal. In these strange times, it's perhaps the latter that's least impressive ...
Key player: Mesut Özil (Arsenal)
Arsenal's resident German playmaker has been enjoying his best Premier League season to date, picking up assists against all comers. Playing just off the striker, he's finally demonstrating why Arsenal paid big money to sign him from Real Madrid back in 2013. Southampton's defensive anchorman Victor Wanyama will be tasked with keeping him quiet, which is certainly no easy task.
Recent history
Arsenal may well be rather alarmed by the fact that Southampton have enjoyed playing the Gunners in recent times. Indeed, they've won their last couple of meetings 4-0 and 2-0 respectively, and have emerged victorious in three of their last four meetings in all competitions. Of course, history only gives us a rough guide, but Arsenal should be bracing themselves for a very difficult contest.
Arsenal injuries and suspensions
Out: Tomáš Rosický (thigh); Santi Cazorla (knee); Jack Wilshere (ankle). In doubt: Danny Welbeck, Francis Coquelin (knee).
Southampton injuries and suspensions
Out: Florin Gardoș (knee), Jay Rodriguez (foot). In doubt: Graziano Pellè (knee).
Arsenal have their customary long injury list, with the latest addition being veteran playmaker Rosický. The Czech lasted just one match back after recovering from a long-term knee problem, and now faces more weeks on the sidelines with a troublesome thigh. Midfielders Cazorla and Wilshere are still out, though anchorman Coquelin and striker Welbeck could both return.
As for Southampton, Romanian defender Gardoș will once again miss out as he recovers from an ACL injury, while attacker Rodriguez isn't yet fit to play after a foot problem. Centre-forward Pellè may also be sidelined -- he's been struggling with a knee injury over the last few weeks.
Match date/time: Tuesday, 2:45 p.m. ET, 7:45 p.m. local
Venue: Emirates Stadium, London, England
TV: TSN1 (Canada)
Online: NBC Sports Live Extra (U.S. - English); NBC Deportes En Vivo Extra (U.S. - Spanish)