"Welcome home, Di Maria!" the club said following a video announcing the signing of the World Cup winner, who, according to reports, has agreed a one-year contract.

Di Maria's first stint with the Portuguese champions was the prelude to his big move to Spanish giants Real Madrid, with whom he won a league title, two domestic cups and the Champions League.

The Argentine spent last season with Serie A side Juventus after seven successful years with Paris St Germain.

Di Maria will join close friend and compatriot Nicolas Otamendi, his team mate for Argentina in last year's World Cup-winning campaign.