Today, Roger will officially break that record.
Federer to match Connors' record
Federer won his 10th Grand Slam title in Australia last month
Roger Federer will equal Jimmy Connors' 25-year-old record as the longest reigning world number one when the new rankings are released on Monday.
The Swiss joins Connors as the second man to hold the top position for 160 consecutive weeks.
Federer's reign began on 4 February, 2004, and such is his lead in the rankings he is certain to remain number one for months to come.
Connors' unbeaten run at the top of the rankings came between 1974 and 1977.
Speaking after winning his 10th Grand Slam title at the Australian Open in January, Federer said that the rankings feat would stand out among his many records.
"I think it's one of the most important records that I'll beat, perhaps even the most significant," said the Swiss. "I'm in a hurry to do it."