Chelsea are monitoring 26-year-old Porto goalkeeper Diogo Costa as they consider moving for the £51m-rated Portugal international.

Arsenal are among several Premier League clubs linked with Porto midfielder Victor Froholdt.

As he prepares to leave Manchester United at the end of the season, Brazil international midfielder Casemiro, 33, has drawn interest from Inter Miami, Porto and Sao Paulo.

Tottenham are keen on Spain striker Samu Aghehowa from Porto, with Arsenal and Chelsea also having an interest in the 21-year-old.

Tottenham and Chelsea are set to go head-to-head in a battle to sign Porto's 21-year-old Spanish striker Samu Aghehowa, who could be made available for 80m euros (£70.5m).