Wimbledon 2016: Sam Querrey up two sets on Novak Djokovic before rain

Novak Djokovic against Sam Querrey at Wimbledon (Getty Images) Novak Djokovic must get to the third round of Wimbledon the hard way after falling two sets down to unseeded American Sam Querrey on Friday.

Unbeaten in his last 30 Grand Slam matches, Djokovic seemed badly affected by a lengthy delay to proceedings brought on by a combination of earlier rain interruptions and Serena Williams taking three sets to finish off Christina McHale.

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Querrey was red-hot, however, and benefited from the momentum gained by coming back from two sets down to beat Lukas Rosol and book his meeting with the world No. 1, opening up a 7-6 (6), 6-1…