By Will Butcher

John Hartson has dismissed Celtic’s chances in the Champions League this season, describing it as a learning curve.

The Hoops are set to face Bundesliga outfit Gladbach on Tuesday night as they look to cling onto any remaining hopes of qualifying from Group C to reach the knockout phase.

But Hartson, who played for Celtic for five years, claimed on his Twitter account that Brendan Rodgers’ side need to look ahead to next season’s Champions League campaign.

The Hoops have struggled alongside the likes of Barcelona and Manchester City, claiming just one point against Pep Guardiola’s side in an enthralling 3-3 draw at Parkhead.

A sobering 7-0 demolition by Lionel Messi and co. at the Nou Camp revealed the difference in depth between Celtic and their Champions League counterparts, before losing 2-0 to Gladbach in October.

Three points against Andre Schubert’s side could give Celtic a lifeline and leapfrog Gladbach into third place in Group C, with difficult ties against City and Barca coming up.

Rodgers, who described Celtic’s group as the toughest in the competition, is without Kolo Toure, Leigh Griffiths and Kieran Tierney who have all been left out of the travelling squad.

During his five years at Celtic, BT Sport pundit Hartson scored an impressive 109 goals in 201 league and cup matches and is held in high regard by Hoops fans. He also had spells with West Ham, Arsenal and West Brom.

In other Celtic news, this defender has also been ruled out of the Hoops clash in Germany.