"When I started out as a referee 20 years ago the FA Cup final was the absolute pinnacle even though it was a very distant dream," he said.
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Webb - who has handed out just five red cards this season in 39 matches - was fourth official at the 2007 final and took charge of the semi-final between West Brom and Portsmouth last year.
Webb, who was in charge for Liverpool's thriller with Arsenal last night, admitted in January he had experienced the lowest moment of his career.
During the Birmingham Wolves FA Cup tie he inadvertently deflected a pass by Birmingham's Radhi Jaidi to Wolves striker Andy Keogh which led to Sam Vokes scoring - Wolves won the match 2-0.
"You want the world to swallow you up at that moment," he said at the time.