Remember when returned to competition in 2007 after having played only four events in 2006. At that time, the American went down to 140 in the rankings.
The former world No. 1 then returned to competition in the 2007 Australian Open despite having a few pounds to lose and managed to win what was her eighth Grand Slam title crushing Maria Sharapova in the final 6-1 6-2.
Serena Williams proved me wrong and I swear to that date to never bet against her again.
One year ago, Serena Williams played and won her last tournament of the season at Wimbledon.
Then a dramatic turn of events happened.
On July 2010, shortly after her Wimbledon run, the 29-year-old injured her two feet after stepping on some broken glass and had to undergo surgery twice.
Elsewhere, earlier this year, the Palm Beach Gardens resident had even more dramatic moments when she suffered from a pulmonary embolism, which was a life-threatening.
Serena Williams would have not played Wimbledon anymore if she did not follow her doctors advice to go and check her health condition several times a month.
Despite what all she's been through, Serena Williams will be back to compete at the third Grand Slam of the season.
After practicing for only one month, the 29-year-old returned to competition at Eastbourne this week with a win over Tsvetana Pironkova and a three set marathon against world No. 3 Vera Zvonareva, the same player she met a year ago in the Wimbledon final. Serena Williams came only two points away from defeating the Russian, which sends a warning to all her future opponents.
The American showed already she still serves very well when she needs to and can also be competitive for three hours, which is amazing.
Very few players would come back being almost favorite to defend her title despite not having played for one year.
As the 2011 Wimbledon is looming, the Williams sisters will have nothing to lose after all what they have been through. Serena will be as relaxed as ever, with all the pressure being on the shoulders of her opponents.
Even more, the Williams have been competing for more than twenty years and have won everything they wished, which answer the question as to why the Williams sisters are still playing tennis?
Yellow balls are moving inside their blood. They still have a huge appetite for competing and winning majors. As long as they are healthy, the Williams sisters could go on playing for two, three more years and still win Grand Slams.
At the same time, they understand that women's tennis is not at it's best position at the moment and they are still the favorites when they enter a tournament, whatever the ranking they have, which is great news for tennis in general.