Ivanovic won her lone grand slam title at the French Open in 2008 and quickly rode her good looks and then number one ranking to a multimillion dollar bank account.

But then a dramatic weight loss by the Serbian eclipsed her tennis as her game until recent months slumped. Last week at Auckland, Ivanovic won her first WTA Tour singles title since 2011; beating Serena's older sister Venus Williams in the final 6-2, 5-7, 6-4.

And while Venus, a five time Wimbledon champion, has been slowed in recent years by an autoimmune disease; Serena Williams it seems has only grown stronger.

In 2013 Serena went 78-4 in WTA Tour matches played while taking the French Open and US Open titles.

Head to head, the 32 year old Williams, a 17 time grand slam winner, leads the 26 year old Ivanovic 4-0 after winning the duos' last meeting 6-1, 6-3 at the 2012 US Open quarterfinals.

Ivanovic likes to play with power. But the problem is Williams likes pace and no one other than an in-form Venus Williams hits the ball consistently harder.

Ivanovic could mix up her game on some points, be aggressive early in other points to force play and hope Serena commits a high number of unforced errors.

But I think Serena will be continually motivated and focused Sunday to do better at Melbourne than she has recently where ankle injuries in 2012 and 2013 severely hampered her play.

The match could be a blowout with Williams hitting extreme winners at ease. However I expect at least one competitive set to thrill the Melbourne crowd.

But it would only be a bump in an otherwise straight and narrow road to another Australian Open title which for Williams looks inevitable.