Costa is on the brink of completing a £32m to Stamford Bridge after passing a medical last night.
The deal is expected to completed in the next few days and Mata, a hero at Stamford Bridge, believes Costa will fit in well.
He said: “I don’t know if it’s been confirmed yet – I don’t think so.
“I wish him the best. He’s a forward who is very well suited to English football because of his power and strength.
“He’s the type of player that thrives there.”
Mata and Costa are currently preparing for the World Cup in Brazil with Spain.