Raul Meireles has signed a four-year deal to join the Blues.
Midfielder, Meireles 28, arrives after just over a season at Anfield in which he made 44 appearances for the Reds.
Born in Aves, Portugal, the highly-rated international began his career with his hometown club before a move to top-flight Boavista, where he spent one season before moving to Porto in 2004.
Chelsea moved for Meireles as soon as yesterday's £40m offer for Spurs' Luka Modric was turned down by chairman Daniel Levy.
But Chelsea saved themselves an extra couple of million by instructing Meireles that he had to hand in a transfer request before they would sanction what is believed to be a £15m deal.
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