be a game of two halves idiom
UK（尤指在体育比赛的两个半场中）双方分别在上下半场占优势
used, especially in sports reports, to say that in a game of football, one team plays better in each half of the game
It really was a game of two halves, with Spurs dominating the first, only to be outplayed by Arsenal in the second. 这确实是一场双方各占半场优势的比赛，热刺在上半场占主导地位，却在下半场被阿森纳反制。