Some rather odd news from the Estoril Open via TennisTV's Nick Lester - https://twitter.com/#!/nicklester:
Wilson rep here in Estoril just told me Del Potro is down to last 3 frames of rackets he used when he won US open in 2009,refuses to..
change despite practising regularly in off season with different ones,comes to tournaments and goes back to his original ones..
apparently was given a new batch of 12/15 rackets just before US open in 09 and down to 3/4 now but doesn't want to switch
wilson rep told me Del potro has 3/4 rackets with him at this present time and no more
Don't get this story at all...