Tottenham and West Ham met at White Hart Lane back in November 2015, and on that occasion the Lilywhites were a class above their London rivals as they won 4-1.
Two goals from Harry Kane and one a piece from Toby Alderweireld and Kyle Walker inflicted a heavy defeat on West Ham, with Manuel Lanzini’s strike proving to be nothing more than a consolation.
There looked to be a huge gulf in standards between the pair on that occasion, but West Ham had their revenge when the two sides met again at Upton Park more recently.
West Ham ran out 1-0 winners over Spurs earlier this month, and Sullivan feels that victory was one of the highlights of a very memorable campaign for his side.
"So far? Too many," Sullivan responded when asked what he's best moment of the season has been to date.
"Beating Spurs at home after they humiliated us at their place. Winning 3-0 at Liverpool, winning 2-1 at Manchester City, coming back from 2-0 down to win 3-2 at Everton, Payet’s free-kick at Manchester United.
"But all that is tempered by the fact we never turned up at Watford or Newcastle and we didn’t turn up until the last 15 minutes at Norwich. Those performances still irk."
West Ham are currently in fifth place in the Premier League table, and they are challenging Manchester City for fourth spot.
Spurs, meanwhile, are locked in a battle with Leicester City for the Premier League title.