Complex sentence: The win also took Kuznetsov to the third round of a grand slam for the first time.And then in US Open he defeated Fernando Verdasco in second round, but lost to Andy Murray in third round.
Split into simpler sentences: The win also took Kuznetsov to the third round of a grand slam for the first time. Later that year, in the US Open, he defeated Fernando Verdasco in the second round, but lost to Andy Murray in the third round.