Grigor Dimitrov moved up to a career-high No. 16 in this week's ATP Tour rankings after winning the Mexican Open.
The 22-year-old Bulgarian climbed six spots with his title in Acapulco, where he cooled off Ernests Gulbis in the quarterfinals, upset Andy Murray in the semifinals and outlasted Kevin Anderson in the final. Dimitrov is 20-5 with two titles in his last seven tournaments dating to last October. He is the youngest player in the top 20.
In other rankings news:
• Tomas Berdych matched his career high by rising one spot, to No. 5, after making the final of the Dubai Championships. He supplanted an ailing Juan Martin del Potro, who dropped to seventh behind Berdych and new No. 6 Murray. The top four of Rafael Nadal, Novak Djokovic, Stanislas Wawrinka and David Ferrer did not change.
• Roger Federer remained No. 8 after winning the Dubai Championships but closed the gap on No. 4 Ferrer to 535 points. Last week, Federer trailed Ferrer by 1,065 points.
• Gulbis, who debuted in the top 20 last week (at No. 18), slipped to No. 22 as the 262 points he earned from last year's Delray Beach Open title dropped off his total.
• Anderson jumped from No. 21 to a career-high No. 18 after reaching his second final in a row.
• Alexandr Dolgopolov has vaulted from No. 54 to No. 31 in two weeks thanks to a runner-up finish at the Rio Open and a semifinal appearance at the Mexican Open. • Federico Delbonis established a career high of No. 44 after winning the Brazil Open for his first title. The 23-year-old Argentine was 61st last week.