Complex sentence: At the Rogers Cup third round, he challenged No.1 Novak Djokovic, winning the first set 6-2 before losing 6-4 in a close third set.
Split into simpler sentences: At the Rogers Cup third round, he challenged No.1 Novak Djokovic, winning the first set 6-2. He succumbed, losing 6-4 in a close third set.