Jordan Thompson has been left exhausted and amazed after a surreal 3am conclusion to the greatest week of his try-try-and-try-again tennis career.

And the 29-year-old, whose triumph made him one of the oldest first-time singles winners on the ATP Tour, has good reason to believe his sporting life really will take off at 30 after an incredible night of double success in Mexico stretching across three matches and six-and-three-quarter hours.

The stalwart Sydneysider not only won his first ATP singles title in Los Cabos but, after that dizzying moment, then went on to play two more matches alongside Max Purcell deep into Sunday morning to lift his fourth doubles crown too.

Such was the crazy scheduling it meant his double triumph which dragged on for exactly five hours on court didn't conclude until 2.55am on Sunday (local time) at the end of a week Thompson could only hail as a "miracle".

He also wrapped up the longest match in tournament history, beating top seed Sascha Zverev after three hours and 40 minutes around 1am on Saturday, meaning he won four matches in the space of an energy-sapping 26 hours.

"It's so late, time for bed," Thompson said after winning the doubles alongside Purcell, who also won the Dallas Open together earlier this month.

"It's nice to finish the week with a win but we're tired," Purcell said.

"We've gotta get to Acapulco, gotta get some sleep and gotta pack."

Fellow Australian Alex de Minaur is the reigning champion at the Mexican Open in Acapulco.

Just a couple of months off turning 30, Thompson joins a list of the top-10 oldest players to win a first tour title.

Among Aussie men, only John Millman, who was 31 and four months when lifting the Astana Open in 2020, was a more venerable first-time champ.