she would be the first tennis player since Steffi Graf of Germany to win the Grand Slam; all four grand slams in one calendar year.

But I think when Venus is playing well, she hits the ball harder than her sister from the baseline and has a better volley at the net. The all-Williams sister fourth round could be a thriller with the winner to face another former world number one; the 23rd seeded Victoria Azarenka of Belarus in the quarterfinals.

I’m picking Venus to defeat the fourth seeded Maria Sharapova of Russia in semifinal one with the second seeded Petra Kvitova of the Czech Republic to top the 18th seeded Sabine Lisicki of Germany in semifinal two.

Venus, the champion in 2000, 2001, 2005, 2007 and 2008, has major problems with the defending champion Kvitova who has the power to get Venus on the run and the serve to stay with Venus on the fast grass.

But if Venus can continue to show her improvements and her return to form as she has over the last year and can stay healthy, I think only her sister can stop her this year on the grass.

Look for Djokovic to top the 7th seeded Milos Raonic of Canada in semifinal one while the second seeded and 2003, 2004, 2005, 2006, 2007, 2009 and 2012 champion Federer stops the home country favorite and third seeded Andy Murray of Great Britain in semifinal two.

And what could be better than a crisp Federer volley winner on match point to defeat the world number one Djokovic after a five set thriller?