Alexander Zverev beats Karen Khachanov at the US Open to reach a third Grand Slam final in a row and continue his bid for a second major of the year. Key points and original sources are listed below.

• Alexander Zverev beats Karen Khachanov at the US Open to reach a third Grand Slam final in a row and continue his bid for a second major of the year.S1S2

• Highlights of the US Open semi-final between Alexander Zverev and Karen Khachanov.S3