5 things you should know about Ivan Ljubicic

#3 He was the World No. 3

Now 38 years old – not much older than Federer himself, Ljubicic went pro in 1998 and was known as a hardcourt specialist. He broke the top 100 the following year, and by 2001 the top 30.

After a highly successful 2006 season, Ljubicic shot into the top 5, taking the World No. 3 ranking

That ranking unfortunately did not hold very long, with David Nalbandian taking that spot soon after.