One’s team backed to win this (3-2-3)
I believe the answer is:
tug-of-war
'one's team backed to win this' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for tug-of-war that I've seen before include "Sporting test of strength" , "Pulling contest" , "Contest of strength" .)