Steffi Graf hails hails Serena Williams 'incredible' on matching her 22-Grand Slam titles record

London: Steffi Graf hailed Serena Williams for an "incredible performance" in matching her long-standing Open Era record of 22 Grand Slam wins.

Williams won her seventh Wimbledon title with a 7-5, 6-3 win over Graf`s German compatriot Angelique Kerber at the All England Club on Saturday.

"What an incredible performance by Serena at Wimbledon," Graf wrote on her Facebook page.

"Such a gift to all sport fans who get to continue to watch her add to an already amazing career #22!!!

"Also, well done to Angelique making Germany so proud with her talent and fighting spirit!"

Men`s world number one Novak Djokovic, who saw his title defence end in a shock third-round defeat to Sam Querrey, also tweeted his congratulations.

The Serb concentrated on the number 22 rather than the American`s age of 34.

"@serenawilliams loves being 22. So young and successful. Well done Rena!" tweeted Djokovic.