Charlie Adam has another pop at former Stoke teammate Xherdan Shaqiri

Stoke City midfielder Charlie Adam has once again criticised his former Potters teammate Xherdan Shaqiri and has said that the Swiss international had let his team down in critical situations last season.

Shaqiri was Stoke's top scorer last term as the club were relegated before he then secured a summer move to Liverpool following a strong World Cup campaign. The 26-year-old scored a tremendous bicycle kick on his unofficial debut against Manchester United on Saturday but Adam warned that he may grow frustrated if he finds himself sitting on the bench this season.

"He's a big player, at times he did well for us," Adam told BBC Sport. "But in critical situations, I felt tracking back and what we needed for the team in a relegation battle just wasn't there.

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"He has got it in him, but he probably knew we were going to get relegated, he was going to the World Cup and had this big move - this move was probably done three, four months ago. "He is a match-winner, but at times it was difficult to play in the same team. The manager would let him get away with certain things."

Adam continued: "He might get frustrated at not playing as much as he wants - it's how long he waits and what (manager Jurgen) Klopp does with him." Adam's remarks follow previous criticism from the Scot on Shaqiri where he said that the player was one of the squad members at Stoke that 'got away with murder'.