TAMARA PRENN IN NEW YORK: Serena and Venus Williams were sensationally knocked out of the first round of the women's doubles on Arthur Ashe on Friday evening. Serena and Venus Williams turn back the clock to defeat Maya Joint and Chan Hao-Ching in a US Open women's doubles first-round epic. Key points and original sources are listed below.

• TAMARA PRENN IN NEW YORK: Serena and Venus Williams were sensationally knocked out of the first round of the women's doubles on Arthur Ashe on Friday evening.S1

• Serena and Venus Williams turn back the clock to defeat Maya Joint and Chan Hao-Ching in a US Open women's doubles first-round epic.S2S3