Tottenham defender Vedran Corluka expects big squad changes this summer.

"It's possible that five or six players will go, but I think that we need at least two or three new signings if we are to increase our ambitions," Corluka told Sportske Novosti.

"Against the big teams, we were at our best, against the sides lower down the table, where physical power is the key, we were weak.

"You have to have a stronger bench to compete in the league."