Chelsea have joined Manchester United and Manchester City in the race to sign Porto's Eliaquim Mangala.
The Daily Express claims Chelsea boss Jose Mourinho is keen on bolstering his defensive options in the summer.
Chelsea have already agreed a deal for Mangala's fellow countryman Kurt Zouma - however Mourinho wants to further strengthen his defensive options.
Manchester City came close to enticing Mangala away from Porto in January but were put off by the defender's £35million price-tag.
The Citizens, who lost 1-0 against Chelsea last night, were also said to be keen on bringing Mangala's club teammate Fernando to the Etihad Stadium.
However Chelsea could beat Manchester City to both targets in the summer if Mourinho gets his way.
Premier League champions Manchester United were also said to be interested in Mangala, as David Moyes is facing the prospect of losing both Nemanja Vidic and Rio Ferdinand at the end of the season.