Arsenal could turn to Southampton full-back Kyle Walker-Peters or his Leicester City counterpart Timothy Castagne before the summer transfer window shuts, according to the Daily Express.
The Gunners are waiting for a full diagnosis from their medical staff on Jurrien Timber after the Dutchman picked up a knock against Nottingham Forest on Saturday.
It is looking far from clear whether the 22-year-old will see action again this term and Arsenal are fearing the worst ahead of further detailed assessment and review with consultants later this week.
The best-case scenario would see Timber miss a couple of months, and manager Mikel Arteta could be forced to go into the market in the coming days.
Both Walker-Peters and Castagne have proven themselves in the Premier League, and the former Spurs star has what it takes to fit perfectly into the playing pattern at Arsenal.
The two-cap England international full-back boasts a tactical intelligence capable of helping Arteta’s wide rotations.
Walker-Peters can play at both left-back and right-back, but he is more incisive in his decision-making and ability to carry the ball into more threatening areas of the pitch when featuring in the former.
The 26-year-old is an excellent dribbler and would be perfect for the inverted full-back system Arsenal currently plays, but whether they plan to make a move for him remains to be seen.
Walker-Peters has been on their radar for a while and will be a cost-effective alternative in the transfer market.
Castagne, 27, is also a top option given his versatility, with the Belgium international also capable of playing as a centre-back and defensive midfielder.
The Gunners will hope Timber has not sustained a season-ending injury, but they need to prepare to be without him for long, and moving for another full-back could become necessary.