Ex-Celtic star Kieran Tierney's first game for Arsenal could come against Manchester United as he continues his comeback from injury.

Defender Tierney, 22, has been struggling with a hip issue since joining the Gunners in a record-breaking £25million move from Parkhead.

The left-back has not yet trained fully with his teammates since signing but has been working hard behind the scenes with fellow defender Hector Bellerin to get himself fit.

Ex-Celtic star Kieran Tierney receives boost as Arsenal set to sell Nacho Monreal

Arsenal even revealed to their fans that Tierney would likely take until October to get himself back to full readiness.

However, with the United game on September 30, and Nacho Monreal looking to move on to Real Sociedad this window, Tierney could return faster than expected.

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The Scottish Sun are reporting that his new side have been pleased with his reaction to light training and he may be cleared to join his teammates early in September.

And he could then be in line to feature at Old Trafford in what would be a baptism of fire in the English Premier League.