When  Matt Serra returned to the welterweight division in 2005, the weight class was dominated by  Matt Hughes .  Hughes had just defeated  Georges St-Pierre to win back the title after losing it to  B.J. Penn . Prior to the Hughes and St-Pierre rematch at UFC 65, Serra was on The Ultimate Fighter 4 as a welterweight contestant. St-Pierre was a coach during the season and Hughes appeared as a guest coach.  Serra and Hughes would go on to have an intense rivalry that began during the filming of TUF 4.