MADRID, Jan 2 - If Ronaldo gets in shape and commits himself to the cause Real Madrid will be able to end their four-year trophy drought according to club president Ramon Calderon.

"He is an exceptional player and if he dedicates himself to the project we will win a trophy because he can provide us with 15 to 20 goals," Calderon told Spanish sports daily Marca on Tuesday.

"He is the sort of player that can win a team the Champions League because he can decide games on his own."

The Brazilian striker has hardly featured for Real this season having struggled to regain fitness after knee surgery following the World Cup.

He has been in the starting line up in only three of the team's 16 league games and has found the net just once.

Calderon said he had spoken to the 30-year-old on the way back from last month's FIFA awards gala in Zurich and was confident the Brazilian could recapture his best form.

"He told me he was very enthusiastic and wanted to get involved, but he has to really commit himself."

With three matches left before the halfway point in the Spanish season, Real are in third place, five points behind leaders Sevilla.

They have reached the last 16 of both the Champions League and the King's Cup.