UEFA Cup holders Porto have joined the chase to sign Brazilian World Cup winner Rivaldo, who was released by Champions League titleholders Italian giants AC Milan earlier this month, the forward's lawyer said Wednesday.

"Porto has shown interest, but there still is no concrete offer," Jose Carlos Lajes told Portuguese radio TSF.

Rivaldo has been seeking a club since being released by Milan after an unsuccessful 17-month spell.

The 31-year-old joined Milan on a free contract, a month after winning the World Cup with Brazil.

Milan coach Carlo Ancelotti limited him to just 16 Serie A matches, and eight Champions League games last season, when he only made the bench in the Champions League final against Inter Milan.

This season has been even worse for Rivaldo, who has made only one substitute appearance in the Champions League, and has not played in Serie A.

Porto are looking to repeat their success of the last season when they won the both the Portuguese Cup and Championship, in addition to the UEFA title.

The club currently leads the 18-team Portuguese first division, five points ahead of Sporting Lisbon.

But Porto will have to do without playmaker Derlei for the rest of the season after he injured a ligament in his right knee in a league match against Alverca on December 22.

The 28-year-old Brazilian striker, the top scorer in the Portuguese premiership, underwent knee surgery on Monday.

Portuguese giants Benfica, who currently lie in third in the league, have reportedly also made a bid for Rivaldo however negotiations have stumbled over wages.