The world number nine beat Spain's Guillermo Garcia-Lopez 7-6 (6), 7-5 in a match that lasted over two hours at the Chennai Open.
The two players were named as the top seeds for the men's and women's singles event at the Australian Open which starts on Monday.
Spain's Carlos Moya has decided to skip the men's team competition to focus on the Grand Slam tournaments and the Masters Cup.
Paradorn Srichaphan overcame a fighting Tomas Zib 7-6 (7-5), 6-3 to enter his fourth successive ATP Chennai Open final.
Hewitt was in commanding form as he beat Carlos Moya 6-2, 6-4 to reach the semi-finals of the Cincinnati Masters, setting up a clash with top seed Roger Federer.
World No. 18 Sjeng Schalken, No. 21 Tommy Robredo and No. 22 Felix Mantilla are the other big names in the tournament.
Rafael Nadal gets the opportunity to avenge his only defeat in 10 meetings with Diego Schwartzman, which he suffered a little over two weeks ago, when Spain's 12-time French Open winner faces the Argentine in the semi-finals at Roland Garros on Friday.
Spain's Carlos Moya pulled out of next week's Paris Masters on Sunday with a shoulder injury, organisers said.
The move is designed to favour 2002 Wimbledon champion Lleyton Hewitt and this year's runner-up Mark Philippoussis.
'It's a new era and will be like adapting to a different routine. Moya has come with new ideas and new methods of working that have worked well and we are excited'
Carlos Moya beat Jonas Bjorkman while Novak Djokovic accounted for Fernando Verdasco in third round matches at the French Open.
The unseeded Thai will face Italian David Sanguinetti, who upset number 31 Carlos Moya, in the second round at the US Open.
The defending champion is on collision course with Lleyton Hewitt, the man whose title he took.
Last year's winner Carlos Moya was beaten 6-4, 7-6 by local wildcard Potito Starace.
Gaudio beat Guillermo Garcia-Lopez in a three set semi-final at the Estoril Open while Robredo advanced after Carlos Moya retired.
The two former world number ones and French Open champions traded blows and counter-punches for two hours 48 minutes.
Safin was followed through the exit door at the Nasdaq Open by fifth-seeded Spaniard Carlos Moya.
While Wimbledon champion Maria Sharapova was buried 6-0, 6-0 by Lindsay Davenport in the semi-finals.
Gaston Gaudio beat Alberto Martin in straight sets to set up an all-Argentine final against wildcard Mariano Puerta in the Buenos Aires Open.
Moya, who went through his first two matches without dropping a set, won the first of his 18 singles titles in Buenos Aires 10 years ago.
Top seed Carlos Moya recorded another straight-sets win at the $380,000 Buenos Aires Open on Wednesday.
Paradorn's role as the flag-bearer of Asian tennis makes him a hero throughout the region.
World number five Carlos Moya beat Spanish compatriot Guillermo Garcia-Lopez on Saturday to set up a repeat of last year's final at the Chennai Open.
Defending champion Carlos Moya of Spain shook off some early season rust to beat Austrian Julian Knowle 6-4 7-6 in the first round of the $400,000 Chennai Open.
The former world No. 1 pair will play against each other at the ATP event in January.
In the semi-finals, Spain beat France while the United States accounted for Belarus.
The two seeded players went down in the quarter-finals of the Olympic men's tennis tournament.
The sixth-seed from Ecuador saved five match points to defeat Spanish teenager Rafael Nadal.