Former West Ham United full-back Rufus Brevett is '100 per cent confident' that the Hammers can overcome Tottenham Hotspur on Saturday.
Gianfranco Zola's side go into the London derby with Spurs in seventh place in the Premier League table, six points ahead of Harry Redknapp's men and fighting for a place in next season's UEFA Europa League.
A positive result at White Hart Lane would enhance West Ham's own hopes of a top-seven finish, while also helping to dent Tottenham's own ambitions of making a late run for European qualification.
Brevett, who tasted victory over Spurs during his time at the club in the shape of a 2-0 win at Boleyn Ground in March 2003, strongly believes Zola's players can win in N17 for the first time since goals from Marc Keller and Ian Wright secured a 2-1 success in April 1999.
"I didn't realise it was such a big rivalry until I signed for West Ham. Everybody said how much we had to beat Tottenham and I didn't know why. It's a big game for the club at White Hart Lane and, although they've picked up since Harry Redknapp went there, if West Ham play the way they have been playing I don't think they'll have many problems.
"I'm definitely 100 per cent confident of victory. If I was a betting man I would put money on it."
The all-action full-back, who made 29 appearances and scored one goal after joining West Ham from Fulham in January 2003, believes the impact made by manager Zola and first-team coaches Steve Clarke and Kevin Keen will have a huge bearing on the result this weekend.
Despite being hit hard by injuries in recent weeks, the Hammers have continued to pick up points and head for Tottenham unbeaten in five Premier League matches. With the players high in confidence, Brevett expects that run to be extended to six on Saturday.
"When the manager first came in West Ham started well then they had a patch where they couldn't win a game even though they were playing well. Now, you can see the confidence the team is playing with. Once you are playing with confidence I think everything else falls into place."
Victory at Tottenham would lift West Ham nine points clear of their rivals, who go into the match in eleventh place. A seventh-place finish would be enough to secure the Hammers a spot in next season's UEFA Europa League, the competition that will replace the UEFA Cup in 2009/10.