Tennis Grand Slam champion, Serena Williams, has said her poor showing in Saturday’s US Open final loss is “inexcusable.” Williams fell to 19-year-old Canadian Bianca Andreescu 6-3, 7-5 at Arthur Ashe Stadium on the same court where she won her first Grand Slam title 20 years ago, nine months before Andreescu was born. Speaking in a post-match news conference in New York, Serena Williams said: “I love Bianca. I think she’s a great girl. But I think this was the worst match I’ve played all tournament. It’s hard to know that you could do better. “Bianca obviously played well. I think her returns make me play better and put pressure on my serve. “At the same time it’s inexcusable for me to play at that level. “I believe I could have played better. I believe I could have done more. I believe I could have just been more Serena today.” Williams, who remains one Slam title shy of matching Margaret Court’s all-time record, has lost the past two Wimbledon and US Open finals since returning after having a baby two years ago. And she’s struggling to find answers for bad performances in the biggest matches. “All of it honestly, truly is super frustrating. I’m so close, so close, so close, yet so far away.