Former world number one Lleyton Hewitt has returned to the top 50 of the rankings after claiming the Brisbane International title.
The 32-year-old Australian had been outside the men's top 50 since 2010 but his 6-1 4-6 6-3 triumph over world number six Roger Federer saw Hewitt rise 17 spots to 43rd in one of the biggest changes to the ATP standings on Monday.
Hewitt was the equal-highest mover in the top 100 with only world number 74 Alejandro Gonzalez of Colombia also rising 17 positions.
Other big movers in the top 50 were Edouard Roger-Vasselin of France (up 12 to 40th) and his compatriot Gael Monfils (up five to 26th), while injured Serbian Janko Tipsarevic plummeted 17 spots to 53rd.
The top 25 positions in the ATP rankings remained the same with Rafael Nadal staying ahead of Novak Djokovic and David Ferrer at the top.
Andy Murray remains fourth, while Juan Martin Del Potro rounds out the top five.
Federer, Tomas Berdych, Stanislas Wawrinka, Richard Gasquet and Jo-Wilfried Tsonga complete the top 10.
In the women's rankings, Maria Sharapova moved above Li Na into third on the WTA standings due to her semi-final finish at the Brisbane International.
Serena Williams remains at the top ahead of Victoria Azarenka, while Agnieszka Radwanska completes the top five in behind Li.
Petra Kvitova, Sara Errani, Jelena Jankovic, Angelique Kerber and Caroline Wozniacki wrap up the top 10.