Putting all the stats together, 6ft 11in tall Ivo Karlovic emerges as arguably the strongest contender. He tops the lists for number of aces, aces per match and percentage of service games won.
Second seed Gael Monfils edged past Croatia's Ivo Karlovic 7-6(6), 7-6(6) and Marin Cilic ousted Argentine Juan Monaco 7-5, 6-1 to progress to the Japan Open semi-finals in Tokyo on Friday.
John Isner and Ivo Karlovic became the tallest doubles partnership when they played their first round match at the Australian Open.
Leander Paes and Mahesh Bhupathi easily advanced to the quarter-finals of the US $ 2,615,000 Cincinnati Masters tournaments along with their respective partners. The sixth seeded pair of Paes and Lukas Dlouhy of the Czech Republic defeated Ivo Karlovic of Croatia and Rogier Wassen of Netherlands 6-4, 6-2 in the second round. Meanwhile, Bhupathi and his Bahamian partner Mark Knowles got a walkover from Czech pair Tomas Berdych and Radek Stepanek.
World number one Roger Federer beat Croatia's Ivo Karlovic 7-6, 6-3 in the Rome Masters on Thursday to book a quarter-final against Czech Radek Stepanek.
Ivo Karlovic and Marin Cilic won five-set marathons at home to put Croatia 2-0 ahead of 32-time champions United States, while Israel stunned favoured Russia to also lead 2-0 in the Davis Cup quarter-finals on Friday. Champions Spain were held to 1-1 by Germany in Marbella, and the Czech Republic and Argentina were tied after the opening two singles in their best of five tie.
Ivo Karlovic has a winning serve but his lack of movement on court proves his undoing.
Kyrgios was raging after losing a challenge on his first serve and then smashed down an unstoppable, untouchable second.
Roger Federer's reign as world number one could end this week after he was beaten 7-6, 4-6, 7-6 by Croatian Ivo Karlovic in the third round of the Cincinnati Masters.
Croatia, Serbia and Austria sealed places in the Davis Cup quarter-finals on Sunday after converting 2-1 overnight leads into winning margins.
Croatia's Ivo Karlovic became the oldest ATP winner since Jimmy Connors in 1989.
Defending champion Andy Murray blew out the cobwebs with a 7-6, 6-4 win over towering Croat Ivo Karlovic on Tuesday in his first match since winning last month's U.S. Open.
Djokovic dropped only three games against Klizan.
Paes and Mahesh Bhupathi took contrasting routes to the doubles quarter-finals in the Internazionali BNL D'Italia tennis tournament in Rome on Thursday. Third seeds Paes and his Czech partner Lukas Dlouhy swamped Ivo Karlovic and Dusan Vemic 6-1, 6-1, while fourth seeded Bhupathi and his Bahamian teammate Mark Knowles survived some torrid moments before beating unheralded Simon Bolelli and Andreas Seppi 7-6(5), 2-6, 10-3.
Leander Paes had a bitter-sweet experience at the Australian Open, sailing into the semi-finals of the mixed doubles but crashing out of men's doubles, in Melbourne, on Wednesday.
Fifth seed Andy Murray, sixth-seeded David Ferrer and defending champion Ivan Ljubicic all fell by the wayside on a day of startling upsets at the Indian Wells ATP tournament on Saturday.
Indian ace pair of Leander Paes and Mahesh Bhupathi registered a straight set victory over Argentina's Juan Monaco and Feliciano Lopez of Spain 7-6, (2) 6-4 to advance to the third round of the Australian Open men's doubles event, in Melbourne on Saturday.
Indian tennis duo of Leander Paes and Mahesh Bhupathi entered the second round of the men's doubles in Australian Open after they rallied from a set down to beat Ivo Karlovic and Dusan Vemica 5-7, 6-3, 6-0, in Melbourne on Thursday.
Women's top seed Russian Maria Sharapova will play France's Camille Pin in her first round match at the Australian Open.
The semi-final line-up at the Rome Masters ATP tournament resembles a Davis Cup tie after Spanish and Argentine players claimed all four berths.
Somdev Devvarman registered the biggest win of his fledgling career when the wiry Indian upstaged sixth seeded Marin Cilic in straight sets in the second round of the USD 1.4 million Legg Mason Tennis Classic in Washington.
France's Arnaud Clement beat Jonas Bjorkman indoors at the Nottingham Open for his second successive victory over a previous tournament winner, having earlier disposed of defending champion Richard Gasquet.
Indian wildcard Somdev Devvarman toppled world number 25 Ivo Karlovic to reach the semi-finals of the Chennai Open on Friday.
Spain's veteran Carlos Moya, who was stunned by Somdev Devvarman in the Chennai Open on Thursday, says India's rising star is armed with a strong game and predicted that he will soon break into the top 100. Somdev defeated the two-time champion in the second round to set up a quarter-final clash against big serving Croat Ivo Karlovic.
Wimbledon picks up the pace dramatically today with the fourth round of the men's and women's singles.
Novak Djokovic beat Rafael Nadal 6-1, 7-5 on Saturday to reach the final of the Cincinnati Masters and bring the Spaniard's 32-match unbeaten streak to a halt. Serb Djokovic will meet Andy Murray in the final after the 21-year-old Briton overcame giant Croatian Ivo Karlovic in the day's other semi-final.
Agassi remains top of the 12-month rankings with 4,090 points followed by Ferrero and Federer.
Top seed Ivan Ljubicic was the only seed to reach the quarter-finals of the Zagreb indoor tournament
Frenchman Fabrice Santoro crushed Novak Djokovic 6-3, 6-2 in the second round of the Paris Masters.
Thomas Johansson saved five match points to upset defending champion James Blake and reach the final of the Stockholm Open.
World number one Roger Federer and Andy Roddick also advanced into the third round.
The Indo-Czech duo beat Chris Haggard and Ivo Karlovic 6-7 (3), 6-3, 10-8 in the quarterfinals.
World number one Roger Federer had to play three sets to reach the Qatar Open semi-finals on Thursday, while number two Rafael Nadal had an easier ride when his opponent retired injured to put him in the last four. Swiss Federer survived a scare from 21-year-old Latvian Ernests Gulbis before winning 6-2, 4-6, 6-4 to progress to the next round where he will face Russian third seed Nikolay Davydenko who beat big-serving Croat Ivo Karlovic 7-6, 7-6.
Lleyton Hewitt breezed into the last four of the Tennis Channel Open with a 6-2, 6-0 win over Philip Kohlschrieber
Wimbledon will herald a new men's champion and for the four players left in the draw, the moment has been a long time coming.
Glynn Hewitt says his son had been unfairly criticised after his first-round loss at Wimbledon to Croatian Ivo Karlovic.
The third seeds went down to the unseeded Croatian pair of Ivo Karlovic and Lovro Zovko at the Swiss Indoors tournament.
Three-time champion Andy Roddick defeated bullet-serving Ivo Karlovic 7-6, 7-6 on Friday to book a spot in the semi-finals of the Washington Classic. Roddick won the tiebreakers 7-4 and 7-5 to set up an all-American affair with John Isner, who beat Czech Tomas Berdych 6-3, 6-7, 6-2 at the $1.4 million hardcourt event.
Andy Murray took another step closer to becoming the first British champion at Queen's Club for more than 70 years when he beat American Mardy Fish 7-5, 6-3 to reach the semi-finals on Friday. Andy Roddick made sure he stayed in the hunt to set up a final date with Murray, scoring a 7-6, 7-6 win over fellow big server Ivo Karlovic of Croatia.
The American won his third successive Stella Artois title with a tight 7-6, 7-6 victory over Croatian Ivo Karlovi.