 Federer 's success in 2008 was severely hampered by a lingering bout of mononucleosis , which he suffered from during the first half of the year . At the end of the year , he would suffer a back injury that would prove to be recurring throughout his career . 
 Federer <a href='null_genetive' title='1'><mark>'s</mark></a>success in 2008 was severely hampered by a lingering bout of mononucleosis , which he suffered from during the first half of the year . At the end of the year , he would suffer a back injury <a href='null_relcl' title='2'><mark>that</mark></a>would prove to be recurring throughout his career . 
Federer  success in 2008 was severely hampered by a lingering bout of mononucleosis , which he suffered from during da first half of tdayear . At the end of thdaear , he would suffer a back injury would prove to be recurring throughout his career .