Spurs are currently involved in the pursuit of the league title and Chelsea fans are eager for their team to derail the North London club's campaign.
The two sides will face each other at Stamford Bridge on Monday night.
"I know the fans are desperate to beat Tottenham and it's a huge game no matter what the circumstances are," Begovic told the club's official website.
"We're in a position where we can have an impact and we need to put in another good performance next Monday, and this win helped for confidence reasons.
"We'll give it our best and if we carry on from today we can get a good result. It's an occasion to look forward to.
"It's difficult to get over the line when you're doing it for the first time and hopefully we can give them a big test next Monday."