Chelsea have reportedly held secret talks with Atletico Madrid over a summer move for Radamel Falcao.
The Colombian striker, who has scored 25 goals this season, has been linked with a string of clubs across Europe in recent months.
However, the Blues made contact with the Spaniards on Sunday as they step up their pursuit of the 27-year-old, according to the Daily Express.
Falcao joined Atletico from Porto in the summer of 2011 for around £34m.