France international Sagna entered the final six months of his current deal with Gunners this month and he is yet to commit his future to the current Premier League leaders.
As a result, manager Arsene Wenger may well have to consider a replacement for the 30-year-old in the transfer window.
The 29-year-old right-back could be ousted from favour should Liverpool sign Barcelona contract rebel, 22-year-old Spaniard Martin Montoya who is heavily linked with a move to Merseyside this month - and this is the player who would also be a better bet for Arsenal.
Montoya has found it hard to break into the first-team at the Camp Nou on a regular and consistent basis and with his contract up in June; he is a prime target for a number of Europe’s top clubs.
However, rather than play a game of musical chairs with Liverpool, Arsenal might well be better off approaching Montoya in the first place – the Spain U21 star is 7 years Johnson’s junior and appears an outstanding prospect.
Montoya would represent an improvement on Jenkinson and but healthy competition for the Arsenal right-back as well as a long-term replacement for Bacary Sagna.
Montoya could be available for far less than his £8 million valuation given his contract situation in Catalonia where Johnson would be considerably more expensive given his experience and status at Anfield. Arsenal are however in a position where they can wait to sign him for free in the summer.
However, one notable positive in signing Johnson over Montoya would be his ability to hit the ground running straight away this season – Johnson is no stranger to life in London as a former West Ham and Chelsea player and wouldn’t need a period of acclimatisation as young Montoya likely would.
Arsenal may also consider in young ex-Barcelona right-back Hector Bellerin, on loan at Watford, they have a future first team player ready now to be an understudy to Jenkinson.
This is a decision Arsene Wenger can wait on, but wait too long and Montoya may well be snapped up by their Premier League rivals.