Manchester United are currently five points behind Arsenal in the Premier League title race - but could be 14 points behind them before they play another game.
United have been in superb form since the World Cup, winning seven and losing just one of their 10 league games since the resumption of the English top division.
Their only defeat came to the Gunners last month, where they were denied by a point by Eddie Nketiah's stoppage time winner.
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Since then, Ten Hag's side have picked up 10 points out of a possible 12, whilst Arsenal have scored only four points.
And United are still firmly outsiders in the title challenge at the moment, if they can sustain another run of form there may yet be the opportunity to lift the trophy in May.
However, they could have a huge amount of ground to make up by the time they next play.
How can Man Utd fall behind Arsenal in Premier League without playing?
Due to the Carabao Cup final this weekend between United and Newcastle, Ten Hag's side will not be in Premier League action.
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That gives Arsenal the opportunity to extend their advantage over the Red Devils, as they travel to Leicester on Saturday.
Mikel Arteta's side are then in action again on Wednesday, taking on Everton in a home fixture. That game was originally due to be played on September 11, but was rescheduled due to the passing of Queen Elizabeth II.
Eight of the other fixtures scheduled for that weekend have since been played, meaning Arsenal vs Everton and Liverpool vs Wolves are the only league fixtures that will take place in the upcoming midweek.
United, meanwhile, are in FA Cup fifth round action next Wednesday, March 1, taking on West Ham at Old Trafford.
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That means they do not play a Premier League fixture until Sunday, March 5, against Liverpool, with Arsenal facing Bournemouth on the Saturday.
Therefore, the Gunners could extend their lead over United to 14 points with wins in their next three matches - all before Ten Hag's side next play a league game themselves. They will, however, have played two games more.
Topics: Arsenal, Manchester United, Premier League, Carabao Cup, FA Cup, Erik Ten Hag, Mikel Arteta