Even if Craig Gordon's Celtic career ended tomorrow, his contribution to the Hoops over the years would be seen as massive.

The former Hearts and Sunderland goalkeeper looked to be heading for early retirement before finding his fitness and form at the Hoops and since his arrival at Celtic Park has often bailed out his team with incredible saves.

This season though he's struggled to capture the form of seasons past and now at 34 years of age, perhaps it's time for Celtic to think about making a change and replace him as their number one.

Replacing goalkeepers is always a difficult task but the Hoops have managed it well in recent years. Artur Boruc was replaced by the impressive Fraser Forster who in turn was replaced by Gordon. Who will be the next shot-stopper at Celtic Park?

Here are THREE that should be on Brendan Rodgers' radar...

Ibrahim Sehic

Qarabag's Ibrahim Sehic is a player in outstanding form, having just had an incredible UEFA Champions League group stage.

Although his side were dumped out of the competition in a difficult group that included Roma, Chelsea and Atletico Madrid, the Bosnian international performed admirably, often winning man of the match awards and making vital saves.

In fact, he made more stops than any other goalkeeper in the competition with 34, according to WhoScored, performing so well that he made the stat tracking website's group stage best eleven.

Across his 153 match Qarabag career, he's kept an impressive 78 clean sheets, more than half his matches, conceding just 113 goals. It's a fantastic record.

At 29, he's coming into his prime and given his European form it wouldn't be a surprise to see richer clubs than Celtic make their move for him. The Hoops should think seriously about trying to bring him to Glasgow.

Michel Vorm

Instead of scouring European football for a viable option, Celtic could always take a look at the squads of the English Premier League and look for high quality goalkeepers who aren't getting a game for their current sides.

One player who fits that bill is Dutch international Michel Vorm, a player who is kept out the Tottenham Hotspur side by the impressive Hugo Lloris.

Usually Spurs' go-to cup goalkeeper, Vorm is never realistically going to replace Lloris at the North London club and Celtic can offer him plenty in the latter stages of his career, not least regular European football and the chance to win silverware.

With Mauricio Pochettino signing the younger Paulo Gazzaniga, who performed excellently on his Premier League debut against Crystal Palace, the chance of regular football is even slimmer now for Vorm.

Celtic could do with his talents.

Frederik Ronnow

Frederik Ronnow is a goalkepper rapidly gaining a reputation as one of Denmark's finest, already gaining international caps as an understudy to Kasper Schmeichel.

He's having a fantastic season at Brondby, keeping 10 clean sheets in 22 appearances and form like that means that it won't be long before clubs from abroad will be knocking on his door looking for his services.

Still just 25 years of age, he's a long-term option for a club like Celtic who have done excellently developing and enhancing goalkeeping talent with coach Stevie Woods.

Fearless, agile and a fantastic shot-stopper, he could be part of the next generation at Celtic Park.