Chelsea have completed the signing of Djordje Petrovic from New England Revolution.

The Serbia goalkeeper joins the Blues for a fee of £12.5m plus £1.5m in add-ons.

Petrovic has penned a seven-year deal with a 12 month option.

Petrovic said: "It's a big step and it's always been a dream of mine to sign for one of the biggest clubs in the world."

He added: "Today I have achieved that goal and I'm so happy."

Petrovic has two caps with Serbia.

Co-sporting directors Paul Winstanley and Laurence Stewart said: 'We are very pleased to welcome Djordje to the club. His performances in MLS have earned deserved praise and recognition – and have prepared him for the challenge of playing for Chelsea.

'Djordje improves an already strong goalkeeping team. We look forward to watching him work under Mauricio Pochettino, goalkeeper coach Toni Jimenez, and the rest of the first-team staff this season.'