Sherwood, who replaced Andre Villas-Boas in December, believes that a lack of a world-class player like former winger Gareth Bale has been the main reason for his side's recent struggles.
"I couldn't tell you my best team, and I don't know whether that's good or bad," Sherwood told reporters. "I have assessed the players more than anyone and I could not tell you the best 11 at Tottenham.
"They are all good, but - and the fans know it themselves - are there any world-class Gareth Bale-type players? No, there are not.
"You always look for a blend, and some of the guys are similar in the way they play. We need different types of midfield player, for instance."