Tottenham need to ‘freshen up’ their squad with new signings in January to keep their top-four hopes alive, according to Joey Barton.

The former Premier League midfielder also claims bringing more top-class players to the club is critical to keeping their own star men happy and hungry for success.

Spurs missed their chance to move into the top-four on Sunday as they slipped to a disappointed 1-1 draw with Southampton, and they could find themselves five points adrift of the Champions League places if Liverpool beat Swansea on Monday night.

Meanwhile, while their Premier League rivals are all busy in the transfer window as they look to strengthen, Tottenham again appear to be sitting on their hands.

Mauricio Pochettino recently said that he is happy with his squad and is ‘not concerned’ by their rivals’ activity.

History tells us that Pochettino is not a fan of the Janaury window – the Argentine has only made one January signing in his five years as a Premier League manager, signing Dele Alli from MK Dons but then loaning him back for the remainder of the season.

But Barton insists a club of Tottenham’s ambition must back their bid for trophies with new signings, or risk upsetting their dressing room.

“I think they do need to freshen it up,” Barton said on the Alan Brazil Sports Breakfast.

“When you’re in the Spurs dressing room and you see everybody else fighting it out for Alexis Sanchez, and Harry Kane’s being linked with Real Madrid, the players must just think, ‘am I in the right place here? Are we really going to challenge for top trophies like the Premier League title and the Champions League?’

“It maybe just puts that little element of doubt in there.

“I’m not saying they should go out and completely break their wage structure and start shelling out loads of money, because it’s not their way.

“But I do think sometimes psychologically signings can bring a big boost to the team, plus if Kane gets injured, they’ve only got Fernando LLorente and Heung-Min Son!”