Definition
This idiom is used, particularly in sports, to describe a situation where the two halves of a game are markedly different, with each team having the upper hand in one of them.
The football match was truly a game of two halves; one team dominated the first half, while the other was in control during the second.
The basketball game was a tale of two halves, with one team excelling in the first period and the other making a comeback in the second.
The cricket match was a game of two halves, with the team batting first performing strongly in the initial part of the game, only to be caught up later.