David Ferrer and Tomas Berdych each gained a rung on the ladder of the ATP's Top 10 list on Monday, moving up to No. 4 and 6 in the world, respectively.

Ferrer vaulted Juan Martin Del Potro for the No. 4 position, one spot away from his career high. He trails Stanislas Wawrinka by 180 points for the No. 3 spot in the world.

Berdych jumped over Andy Murray to take back No. 6, tying his career high. He's just 10 points behind Del Potro for No. 5. This is Murray's lowest ranking since August of 2008 when he jumped to sixth from ninth. A string of injuries have seen Murray drop five spots since mid-August of 2013.

There were two other moves in the Top 20. Kei Nishikori moved up to No. 15, bypassing Mikhail Youzhny. Poland's Jerzy Janowciz rose to No. 19, dropping Grigor Dimitrov to 20th.