UEFA President Aleksander Ceferin says he won't run against FIFA President Gianni Infantino but warned the beleaguered head of world soccer that he must either quit or face a leadership challenge in March.

Infantino has come under increasing pressure to step down over his plan, now aborted, to sell stakes in soccer's biggest tournament, the World Cup, to private equity investors. Three of the sport's continental confederations accused him of "deception" and European soccer body UEFA threatened a boycott of FIFA competitions.