Tottenham Hotspur have formed the basis of success on their willingness to work hard so far this season.
Nicholas fears that this approach could prove costly as the season progresses though, and he predicts that Tottenham's players could become tired when the season reaches crunch stage.
"There's too much similarity with all the players," he said. "We have said it for three seasons at Spurs.
"Pochettino has settled things down, and gone with the younger guys, and put legs in the team. The basic thing is that Spurs have the balance right at the minute, but they run over the top of teams.
"When you come up against the better teams in this league, they'll run out of strength. It just becomes that way. They need to get Harry Kane scoring goals."
Tottenham have the added complication of playing in the Europa League, meaning that they have a demanding schedule, but Mauricio Pochettino's teams are famed for having good fitness levels.
The Argentine boss will be hoping that his Spurs can cope with his demanding approach, too, as they have put together a good start to the new campaign.
The Lilywhites are unbeaten in their last eight Premier League matches, and they appear to have the capabilities to mount a push for a European place.
Tottenham are currently in seventh place in the Premier League table, with their next fixture in the league coming against Bournemouth on Sunday.