That's just plan incorrect Zim, sorry. Watch the Masters final in Miami against Murray (though it was a truly horrific match) and two of the matches against Nadal in Masters events this year. Murray's match against him at Wimbledon last year was a real slog and he was taking it to Djokovic whilst there was bad wind around at the US Open (before the match was stopped and they resumed the following day).
His record isn't much worse than any of the other second tier guys against the tier one guys.