Stars wish Serena good luck

Ahead of a potential record-breaking grand slam, Nike put together a heartwarming video for Serena Williams.

The world number one is currently tied on 22 grand slam titles with Steffi Graf.

Should the American win a seventh US Open title at Flushing Meadows next Saturday, she would hold the Open Era record for the most grand slam singles titles.

The video features several international sports stars, including legend Michael Johnson, Roger Federer, John McEnroe and US gymnast Gabby Douglas.