Photo by Steve Welsh/Pool via Getty Images

Celtic are interested in signing Dundee United goalkeeper Benjamin Siegrist amid doubts over £5 million summer signing Vasilis Barkas, the shot-stopper’s agent told the Mail.

When the Premiership champions forked out over £5 million for the Greece international in July, few expected that they would be in the market for a new goalkeeper just six months later.

Barkas was left on the bench for Sunday’s Scottish Cup final victory over Hearts after a series of error-strewn displays cost him the faith of under-fire manager Neil Lennon.

The changing of the guard at Celtic: A symbolic Scott Brown moment at Hampden

The changing of the guard at Celtic: A symbolic Scott Brown moment at Hampden

Scott Bain’s inconsistencies have seen him lose the number one shirt too, with youngster Conor Hazard thrown in at the deep end out of necessity rather than desire.

But with Celtic showing an interest in Siegrist, it seems unlikely that Barkas or Bain will still be plying their trade in the green half of Glasgow for much longer.

Not even a club of Celtic’s side need four senior shot-stoppers after all.

“Benjamin has had an extraordinary season,” agent Dr Thomas Kraft explained. “There is interest in him from clubs in the Bundesliga and the Dutch Eredivisie.

Photo by Mark Runnacles/Getty Images

“Celtic have also scouted him several times, that is true. But today, at this moment, we have no official offer from Celtic.

“If there was a chance to move to Celtic, then that would be a very good step for Benjamin.”

Siegrist, a one-time Aston Villa youngster, has made a superb impression in the Premiership this season, with Dundee United boss Micky Mellon labelling him the best glovesman in the whole of Scotland (Courier).

The Mail adds that the Tangerines would demand around £1 million for Siegrist.

Conor Molloy/Action Plus via Getty Images

In other news, Report: 'Superb' Arsenal ace could snub Gunners for lucrative deal elsewhere