Dubai top seed says he's producing peak play now.
World No. 12 cites one key quality combating slump.
Gold medal champion getting in tune in Acapulco.
Nightmare opponents don't scare Swiss anymore.
Former world No. 2 joins iconic Italian sportswear brand.
Kei Nishikori says there's a simple reason Naomi Osaka will cope with life at the top.
The Swiss will meet Germany's Philipp Kohlschreiber in first-round action at Dubai.
