Nishikori survives! He's fighting and how. Guess it's not over till it's over, but Federer has pulled out some great points here. Nishikori's positivity is the most impressive here, and the Japanese ace has reached deep for some wonderful shots.
There's a great angled one-handed backhand from Nishikori to deny Federer a point, but the Swiss follows that up with an ace in his service game. And there's a quick forehand winner to finish as Federer leads 4-1 in the final set. Is this it for Nishikori?
This might as well be match point for Federer. He's about to break Nishikori again, and there are some incredibly fast shots being played on court! Just as Federer looks set to break, Nishikori comes up with a great shot.
It's not just Federer - it has seemed like all of the old guard have outlasted their younger counterparts and how! We saw that in the Rafael Nadal - Sascha Zverev match, we're seeing it now with Kei Nishikori, and we could well see it again.