overmatch
withstander
corrival
keep someone honest
high ground
one-sided
rivalry
duel
contest
victor
encounter
superior
master
oppugner
adversary
trench warfare
opponent
coopetitor
giant-killer
grudge match
dilemma
maintain
chump blocker
uphold
outrival
field
meet
outvie
Law of Conservation of Ninjutsu
play
take on
infighting
tomato can
clash
meet one's Waterloo
dance
unbeatable
counterpunch
flat-track bully
upsetter
clean up
deathlock
opposite
critic
shini-tai
individual sport
meet one's match
some days you get the bear, other days the bear gets you
kingmaker
matched
concurrent
1v1
counteradvantage
war of attrition
counterdefensive
archcompetitor
showdown
chicken
smell blood
heartbreaker
man up
rivalrously
supercompetitor
nonrival
simul
play fight
tenuki
dangerman
competitorship
one-upmanship
superfight
man
knock someone off their perch
rival
down
wrestle
set point
outer
suki
barracuda
put away
derby
archrival
battle it out
rematch
feeder
OTK
ownage
evasive action
manoeuvre
tweener
maneuver
return match
battle
triangulate
to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.