Complex sentence: Golubev again attempted to qualify for the Open 13 in Marseille, but fell just one set short, losing to Ivan Dodig, but then went on a long losing streak, failing to win a singles match between mid-February and mid-April.
Split into simpler sentences: Golubev again attempted to qualify for the Open 13 in Marseille, but fell just one set short, losing to Ivan Dodig. He then went on a long losing streak, failing to win a singles match between mid-February and mid-April.