Watford goalkeeper Ben Foster has urged Elton to cancel a gig in Copenhagen, in order to attend the team's FA Cup final against Manchester City on May 18.
The Hornets have reached the FA Cup final for the first time since 1984 and would lift the famous trophy for the first time if they upset favourites City at Wembley Stadium.
"It's no dilemma. He should cancel right now," Foster told reporters following Watford's win over Huddersfield on Saturday.
"I have loads of people I know who have weddings for that day and stuff. It is their own fault -- don't book a wedding in the summer for Cup final day."
The rock veteran is Watford's honorary life president and was chairman of the club in the 1970s and early 80s, and even has a stand named in his honour at Watford's Vicarage Road, but the vocalist is set to miss the team's biggest match in years when his world tour reaches Denmark on the same night as the final.