Spurs have spent most of the season hot on the heels of the top two teams in the Barclays Premier League but now find themselves in danger of slipping out of the top four after successive defeats against Arsenal, Manchester United and Everton.
Arsenal now trail their bitter north London rivals by just one point and Redknapp said: "We have had a couple of results that haven't gone our way but the performances have been excellent."
He added: "If we were playing badly you would start to worry but we haven't.
"I've beaten Manchester United a couple of times in my career but I've never had a team that has played so well against them as we did two weeks ago. I came away wondering how we didn't win, and it was the same at Everton.
"We were just unfortunate. We didn't get the results but I have no problems with the performance. If they had been spread out over the season, you wouldn't have noticed them.
"We probably average two points a year in those fixtures. We could have easily taken six points out of those games."
Redknapp has spent most of the season claiming that he has a squad capable of winning their first league title in 51 years. The 65-year-old has had to scale back that ambition thanks to his team's recent form, but he thinks his team's early-season prowess has led to hugely-inflated expectations.
"If we finish in the top four we have over-punched our weight to be perfectly truthful," Redknapp added.
"We will have way exceeded expectations. We've only finished above Arsenal once and finishing above Chelsea... my god! Finishing above Liverpool is hard enough. We've only finished in the top four once. It's not as if we have been there every year. It will be a fantastic achievement if we do it this year and I think we will do it."
Source: PA
Source: PA