Complex sentence: Golubev played in the 2010 International German Open and World No.6 and defending champion Nikolay Davydenko to earn a spot in the quarterfinals, and then defeated Denis Istomin 6-4,6-1 to earn a semifinal berth.
Split into simpler sentences: Golubev played in the 2010 International German Open and World No.6 and defending champion Nikolay Davydenko to earn a spot in the quarterfinals. He then defeated Denis Istomin 6-4,6-1 to earn a semifinal berth.