Chelsea have spent almost £250m on summer signings and Owen Hargreaves believes Estevao Willian could be the most exciting of the lot.
The Premier League club agreed to sign Brazil winger Estevao from Palmeiras in May but agreed the move would not take place until the summer.
Estevao scored 27 goals in 83 appearances for boyhood club Palmeiras, quickly establishing himself as one of the most highly-rated players in Brazil.
Despite only turning 18 earlier in the year, Estevao has already earned five caps for Brazil and received praise from national team boss Carlo Ancelotti, formerly of Real Madrid.
Estevao featured in the Club World Cup for Palmeiras before finally moving to Chelsea and playing under Enzo Maresca in pre-season.
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