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Wojciech Szczesny will benefit from Petr Cech's wisdom if he joins Arsenal

If, as the rumours suggest, Arsenal complete a move for Chelsea goalkeeper Petr Cech, it leaves Arsene Wenger with a surplus of players for that position.

While it's good to have strong competition, three into one just won't go and so one of Wojciech Szczesny or David Ospina is likely to leave the club. As of now, with reports of keen interest from Fenerbahce for the Colombian, it looks as if Ospina is the most likely of the two to depart.

It would be odd (if not unprecedented) for a player to leave after just one season, but to my mind it makes more sense despite the fact he ended up finishing the last campaign as the first choice keeper in the Premier League.

There's little point drawing on statistics for Ospina to compare him to other Arsenal goalkeepers. With just 18 Premier League appearances, three in the Champions League and a single run-out in the Capital One Cup, the sample size is just too small. Particularly when those statistical comparisons are being made with Szczesny who, since his debut in 2009, has played 181 times for the club.

Ospina played well since he was handed his chance due to the Pole's form (and tobacco-based indiscretion) but doesn't look like a keeper who can really make the difference for a team aiming to win a title. A solid number two, undoubtedly, but not anything more than that.

His physical limitations in the modern game have been exposed at times. At just six feet tall his lack of reach is an issue, with former Arsenal goalkeeping coach Bob Wilson -- who this week suggested the Gunners would be "fools" not to sign Cech -- saying back in May, "I have admired Ospina but he will not get shots that other keepers can because of his size, that is a problem. These days, with the way the ball moves and the size of players, a goalkeeper needs to really be 6-foot-3 at least."

There's little Ospina can do about his height, obviously, but the realities of the modern game mean size is important in such a crucial position. It's also been too easily forgotten that in the 2013-14 seaso,n the two keepers with the most clean sheets in the league were Petr Cech and Wojciech Szczesny. They shared the Golden Glove accolade with 19 shut-outs each and although Szczesny's form dipped this season, you feel he's still got the potential to improve considerably.

Last week I wrote here about Arsenal's ability to improve by making additions to their coaching, as well as playing, staff -- paying particular attention to the coaching of the keepers.

If Cech arrives, it's probable that he'll be accompanied by his long-time coach and mentor, Christophe Lollichon. Arsenal have already made space by allowing one of their goalkeeping coaches, Tony Roberts, to join Swansea. Furthermore, if Lollichon does join with Cech, he'll obviously be working with the club's new No. 1 keeper and as the keepers train together, he'll be working with Szczesny too. New methods, new routines and new drills might well be just what the Pole needs to make progress as a player.

It's also worth pointing out that since his debut and his promotion to first choice at the club in 2010, he's never had an experienced, quality goalkeeper to work with. Manuel Almunia was certainly not that and although Szczesny had a close relationship with compatriot Lukasz Fabianski, his international colleague was a flaky performer for the majority of his Arsenal career.

What might it do for him to train with Cech? To study his methods and preparation, and to learn from a man who has won it all at club level already. It's impossible not to think it would be hugely beneficial to him, and to Arsenal, to have that kind of working relationship with a more senior player -- someone who can give him some of the guidance he's obviously been missing.

2014/15 was a curious season for Szczesny. He lost his place but it's clear Arsene Wenger still has enough faith in him to play him in the team's most important game -- the FA Cup final. He had little to do that day, but earned his medal having missed out the year before to Fabianski.

Cech's potential arrival would see him start next season as the number 2, but if he's willing to learn and buckle down properly, it might just be the making of him in the long-term.