Complex sentence: In 1999, El Aynaoui won his first top-level singles title in Amsterdam and the following year he reached the quarter-finals of the Australian Open where he lost to Yevgeny Kafelnikov.
Split into simpler sentences: In 1999, El Aynaoui won his first top-level singles title in Amsterdam. In 2000, El Aynaoui reached the quarter-finals of the Australian Open where he lost to Yevgeny Kafelnikov.