Travis Kelce's clearly been spending time with Taylor and a tailor ... as the Chiefs star pulled up to Kansas City's season-opening game in Brazil looking fresh in a custom suit!
The tight end -- who is entering his 13th NFL season -- turned heads as he arrived at Corinthians Arena in São Paulo ... donning some shades, a white shirt and an all-black suit.
The 10-time Pro Bowler looked serious as he went to clock-in .