Former Everton defender Martin Keown has questioned the club's decision to pay £28m for Romelu Lukaku.

The Toffees recently broke their club-record fee for the Belgian striker following his successful loan spell at Goodison Park last season.

However, Keown is unsure whether manager Roberto Martinez has done the right thing by spending so much money on the 21-year-old.

"Fair play to Everton - they've had to watch Liverpool spend money over the years whereas they had to rely on David Moyes to find a little gem and bring him through. What this shows is real intent from Everton," he told Sports Mole.

"[However] I'm not sure that he's got it right with Lukaku. He's got a lot to prove; he was disappointing in the summer playing for Belgium. He was playing like a pussycat instead of the lion that we know he is."

Everton start the new Premier League season away to Leicester City on August 16.