London giant Chelsea, who were previously reported to be chasing Barcelona B's Brazilian-born Spanish starlet Rafa Alcantara, have been told that the club will have to break the bank if they ever intend to lure away the youngster from Barca.

Alacantara, popularly known as Rafinha, is the younger brother of Barcelona star Thiago Alcantara. He played alongside Spaniard Oriol Romeu, for the Barcelona youth team before the latter moved to Chelsea last summer.

Although the youngster signed a new deal with Barca last week, sources in Spain revealed that the new contract has a two-tiered buy-out clause which could entice Chelsea into making a move for the 18-year-old. The player's new deal states that his current buy-out clause will be just £10 million until June 2013. After that it will increase up to £25 million.

The player hopes to reach high standards at the Nou Camp but he fails to do so, Chelsea will be waiting to give him an opportunity to prove his worth in the Premier League for his initial fee of £10 million, according to a Talksport report.

Rafael Alcantara do Nascimento made his first team debut on Nov. 9 this year when he came on for Cesc Fabregas in a 1-0 away win against CE L'Hospitalet for the season's Spanish Cup.

He has made a total of 21 appearances for the Barcelona B side and has managed to score six times.