By Nick Georgandis
Roger Federer retook the No. 2 ranking in the world by the slimmest of margins on Monday in the latest ATP listings.
Andy Murray's early loss at the Monte Carlo Masters dropped the Scot 10 points behind Federer into the No. 3 position in the world.
Novak Djokovic increased his lead as No. 1 in the world by defeating eight-time champion Rafael Nadal in the tournament's final. Djokovic's 12,900 points are more than 4,200 ahead of No. 2 Federer.
Nadal dropped nearly 1,000 points behind No. 4 David Ferrer with the defeat and if he is unable to keep up his annual frantic pace on clay, he is in jeopardy of falling further, now just 1,200 points ahead of No. 6 Tomas Berdych and No. 7 Juan Martin Del Potro.
Canada's Milos Raonic climbed two spots to No. 13, tying his career high.
The biggest move in the top 25 was by Italy's Fabio Fognini, who rose eight spots to No. 24 after reaching the Monte Carlo semifinals.
The biggest tumble of the week befell The Netherlands' Robin Haase who dropped 21 spots to 71st from 50th.
Just 7-10 on the year, Haas lost in the first round of Monte Carlo a year after his surprising trip to the quarterfinals there.
With most countries involved in Fed Cup playoffs, there were no rankings moves inside the WTA's Top 50 this week.