Andy just a got time warning. Looks like the umpires are being really strict about this now - just so long as they apply it to Messrs Nadal and Djokovic as well.
This is what I've noticing lately that they are being very strict with the rules. Remember Gasquet just a few weeks ago? He then had a row with the umpire and that wasn’t even a real warning.
All good as long as the real culprits are given the same treatment.