Pato, whose full name is Alexandre Rodrigues da Silva, is a versatile forward player with an excellent touch and impressive turn of pace.

Pato (who is pictured above with technical director Michael Emenalo) said: ‘I am so happy to sign for Chelsea. It is a dream for me. I am looking forward to meeting and getting to know my new team-mates and cannot wait to play.

‘I thank Chelsea for their support and hope I can repay this faith to the club and its fans.’