Question

帮忙分析一下这句话的语法结构，谢谢

Hurd thus became chairman on what amounts to his opponent double faulting on match point.

Answer 1

Hurd thus became chairman on what amounts to his opponent double faulting on match point.
就像（在网球比赛中）对手在局点双发失误一样，赫德成为了主席。
感谢楼上对专业背景的翻译，让我对本句的意思有了头绪。但我认为主句“赫德成为主席”仍然是本句的重心，而“局点双发失误”是比喻。
Hurd thus became chairman 是主句
on表示在……情况下
what amounts to 相当于……的（情况）
his opponent double faulting on match point 独立主格结构做“相当于”的介宾。

外语类团队《康桥郡》欢迎求助，并欢迎具备一定各种外语知识并热心助人的有志之士加盟，携手并进，共创辉煌！——尤其欢迎楼上“看水过桥”加盟。
http://zhidao.baidu.com/team/view/%BF%B5%C7%C5%BF%A4

Answer 2

不什么好分析的！
赫德在对手的局点双发失误后，重新占据主动。