But Nishikori, who had lost nine consecutive ATP finals over 52 tournaments in almost three years, broke the Russian player's serve on four consecutive points in the final game to clinch the match in just 2 hours, 6 minutes, at Pat Rafter Arena.
"If I'm being really frank, I just feel like I had the worst attitude today".
Regardless of whether he choses to play in Sydney or not, Medvedev leaves Brisbane with strong preparation behind him for the Australian Open.
"But (Stubbs) said, "I am absolutely sure you can win this match", which gave me some confidence and belief that I can do it and that's what I did".
"She believed that I can still win it - I felt there is no chance I can win this match", Pliskova said.More news: Saudi women to get divorce confirmation by SMS from courts
Despite falling 5-1 behind in the first set in New Zealand, Statham reeled off six games in succession to move ahead and a single break in the second proved enough to delight his home crowd.
"I don't know what really changed at 5-4", Tsurenko said.
Russian Medvedev began strongly but, after clinching the opening three games, mistakes crept into his play and he lost six of the next seven to drop the opening set.
"I think everything was against me today". Nishikori and Medvedev split their two FedEx ATP Head2Head meetings, with the Russian winning their most recent contest a year ago in the Tokyo final.
In the women's tournament Karolina Pliskova recovered to blaze past Ajla Tomljanovic 6-1 1-6 6-1 and into the Brisbane International semi-finals.More news: Justin Fields pens note to Georgia fans on Twitter
The world No.31 is expected to rise two spots despite not replicating his audacious semi-final run of 12 months earlier at the Brisbane International.
By and large, the final was an extension of the rock-solid tennis he produced all week as he won 6-4, 3-6, 6-2 and was for once the man making the winner's speech, not politely applauding as the gallant loser.
"I was sulking a bit and there are moments that I tried not to do that".
"It's going to be a big lesson for me, and I'm trying to stay positive".More news: Kawhi Leonard Gets Booed By Spurs Fans In Return to San Antonio