Serena Williams shrugs off pressure of calendar slam

London: Serena Williams insists 'I don't need another Wimbledon' despite inching ever closer to her first calendar grand slam.

Garbine Muguruza was just five when Williams claimed her maiden major title at the 1999 US Open: now she stands between the 33-year-old and a sixth SW19 triumph.

Left: Serena Williams celebrates her semi-final win over Maria Sharapova on Thursday. Pic/Getty Images

Williams believes staying "relaxed" about "the obvious" -- her way of referencing the calendar slam bid after banning all talk -- has fuelled her three consecutive grand slam successes. Top seed Williams meets 21-year-old Muguruza in her eighth Wimbledon final on Saturday, aiming to complete a second "Serena Slam" in holding all four major titles at the same time. Williams must win Wimbledon then defend her US Open crown to complete her first calendar slam -- but claims "it's not as stressful" since matching Martina Navratilova and Chris Evert's 18 major titles.

"I've won so many grand slam titles," said Williams, who boasts 20 major triumphs. And I'm at a position where I don't need to win another Wimbledon.

"I could lose tomorrow (Saturday). Sure, I won't be happy but I don't need another Wimbledon title.

"I don't need another US Open. I don't need any titles to make it. Every time I step out on court, the practice court, the match court, I do look at it as a more fun time because it's not as stressful as it was.

Muguruza thrashed Williams 6-2, 6-2 in the second round at the 2014 French Open, to spark a period of soul searching that led the American to compose her current winning streak.