GLASGOW, Scotland (AP) — By resigning as chairman of troubled Scottish champion Celtic citing “abuse and threats” from fans, Peter Lawwell also must leave an influential position shaping the Champions League. The European Football Clubs group — recently rebranded from its European Club Association name — said on Thursday it is “working with Peter to organize a smooth transition of his EFC roles and responsibilities.” Lawwell was one of four vice chairmen working with EFC leader Nasser Al-Khelaïfi, and also sat on the board of UC3, the joint venture between the clubs and UEFA that decides the multi-billion dollar commercial strategy for the Champions League and other competitions. Lawwell said on Wednesday he will leave Celtic, where he previously was CEO for 18 years, at the end of the month.