win (someone or something) away from (someone or something)

1. To obtain something that had been held by someone or something else by defeating them in some contest or competition. The newcomer managed to win the title away from the five-time heavyweight champion in last night's thrilling match. Everyone was shocked when the young senator managed to win the election away from the incumbent president.

2. To woo or seduce someone, causing them to abandon someone or something else. He managed to win Samantha away from her husband, and the two absconded to Italy together. All of the girls in our class have had hopeless crushes on Edward, but no one has been able to win him away from his books.