Former Tottenham midfielder Gus Poyet says his old club need to attack the summer transfer market.

Poyet has offered his support to manager Jose Mourinho and says that no manager can transform a club's fortune that quickly.

Instead, he cites the forthcoming transfer window as a key moment for his former club.

"I think it is the end of an era, the end of a process," Poyet told Goal. "At certain places, you can manage the process in a way by slowly changing. Sir Alex Ferguson was the master of that. He was always one step ahead of allowing important players to leave and then replace them.

"There are other places where you hang onto a team until the end and then you feel like you have to change everything. I think Tottenham is in that place at the moment. This defends every manager in the world, not only Jose Mourinho."

Poyet believes that, having built a state-of-the-art stadium and training ground, it's time for Spurs to focus on investment in the playing squad.

"They had their finances and a clear plan under Pochettino to build a training ground and stadium, taking them to another level. Somehow they still did well without too many changes in their squad.

"The strategy took them to a higher level but now they need to focus on the sports side again. I wouldn't be too critical. That's football that you need to tweak it after a while."