Portuguese heavyweights Porto have signed Cape Verde-born defender Rolando Jorge Pires da Fonseca, or simply Rolando, on a four-year contract from rivals Belenenses.
The 22-year-old's contract with Belenenses ran until the end of the present campaign.
"Everything has been sorted out," said Porto president Jorge Pinto da Costa. "Rolando will play for Porto for the next four seasons."
Porto have been crowned Portuguese Liga champions already this season. The 2003/04 UEFA Champions League winners are 18 points clear of their nearest challengers Vitoria Guimaraes with four matches remaining.