Atletico Madrid coach Diego Simeone won't block Diego Costa from joining Chelsea in the summer.

Chelsea's visit to the Vicente Calderon on Tuesday could easily double up as a scouting mission for Jose Mourinho as he focuses on Diego Costa.

"If Costa decides to go then I'll be the first to say 'that's fine'. Our philosophy is to find players and make them better," said Simeone.

"It was the same last season. Falcao comes with an offer from Monaco and what are you going to say? You can't say no to someone who has given you their life on the pitch."