Chelsea FC have announced they reached an agreement for the transfer of Brazilian left-back Felipe Luis from Atletico Madrid.

Agreement reached with Atletico Madrid for the transfer of Filipe Luis:

— Chelsea FC (@chelseafc) July 16, 2014

However, the fee is undisclosed but it is believed to be in the region of £20 million.

The 28-year-old defender has established himself as a key player for Los Colchoneros over the last few seasons and helped his club to lift the La Liga title last season, and finishing as runners-up in Champions League.

The Brazilian is widely seen as the ideal replacement for Ashley Cole, who has recently signed a two-year contract with Serie A giants AS Roma.

Here is how Chelsea fans reacted on Twitter after the agreement reached for the transfer of Luis.

Remember when we were accused of having an ageing squad in 09/10? Well we won the league that season. So what if Filipe Luis is 29?

— John (@TheChelseaTalk) July 16, 2014

Mourinho is a genius. Sold David Luiz for £50m and signed Filipe Luis, Costa & Cesc [Tiago to follow]. Not to mention Zouma.

— Sergi Domínguez (@FutbolSergi) July 16, 2014

Welcome to Chelsea, Filipe Luis! #CFC

— S (@TheChelsViews) July 16, 2014

Our Summer So Far… Diego Costa Cesc Fabregas Filipe Luis (nearly) Courtois is back And the window’s hardly even started yet… #CFC

— (@CheIseaTalk) July 15, 2014

Welcome @FilipeLuis03 to the bridge and good luck to @dembabafoot at besiktas.. Thanks for everything! #KTBFFH

— armanda geraldy (@armandageraldy) July 16, 2014

Zola was brilliant at 30 Makalele signed in his 30s, Drogba peaked at 30, Lampard brilliant in his 30s. Ballack in 30s. Age is just a number

— John (@TheChelseaTalk) July 16, 2014

Just need to sell Ramires and give Nando a contract extension and it’s the best summer ever!

— David (@TekkaBooSon) July 16, 2014

Yet another star, welcome Filipe Luis…

— Sumit Rawat (@sumitrawatIN) July 17, 2014