Mohamed Elyounoussi has potentially caused irreparable damage to his Southampton future. After being substituted by loan manager Neil Lennon in Celtic's recent match, the striker was seen using his phone on the sidelines whilst the game was still playing out.

The Hoops boss is furious over this and it's sparked a lot of angry debate amongst former professionals. But one man who will be deeply disappointed in Elyounoussi is Ralph Hasenhuttl.

Is there a way back for Elyounoussi?

Chris Sutton has slammed the Norwegian for his "unacceptable" behaviour during the Europa League clash.

"That’s scandalous. Is he committed to the cause? Is he committed to the club? Totally unacceptable," he said (via Daily Record). "That's a selfish, self-centred, egotistical individual who doesn't care about the rest of his team-mates."

Elyounoussi's actions have landed him in hot water with his loan club, but it's what awaits him back on the south coast he should be worried about. Player attitude is something that Hasenhuttl holds to an extremely high regard, and news travels fast. Once the Austrian learns of his player's controversial actions, he could completely take back everything he said about a potential St Mary's return.

Hasenhuttl recently stated that he is monitoring Elyounoussi's progress and admitted he could be looking at a return to first team action once his loan spell at Celtic finishes. The 26-year-old's status with the Saints was low after failing to impress, but it's been a different story up in Scotland.

He has contributed seven goals and four assists so far this season and could may well have been looking at challenging Che Adams upon his Southampton return. However, the £8.5million-rated ace's recent foolish behaviour could have just undone all of his hard work this campaign and he may well have lowered Hasenhuttl's opinion of him.

In other news, Kyle Walker-Peters could be given huge Southampton responsibility amid crisis...