Chelsea have joined the list of clubs following Porto's Brazilian defender Eder Militao.
The 20-year-old only joined Porto last summer from Sao Paulo after initially being considered by Manchester City earlier in the year.
The versatile centre-back has continued to impress and has been followed by Manchester United, Everton and Juventus this season but Premier League rivals Chelsea have also taken note as they consider options ahead of January.
Militao is understood to have the same agents as David Luiz and Willian.