Complex sentence: Berankis had to retire in the next round against Fernando Verdasco because of a back problem, which started after Berankis skipped post-match procedures and rushed from Davis cup match to the airport for 36 hours trip from Tallinn to Indian Wells.
Split into simpler sentences: Berankis had to retire in the next round against Fernando Verdasco because of a back problem. The problem started after Berankis skipped post-match procedures and rushed from the Davis cup match to the airport for 36 hours trip from Tallinn to Indian Wells.