Djokovic beat Fernando Verdasco in straight sets to progress to the last-16 at Roland Garros.
The Serbian has only dropped one set all tournament as he set up a showdown with Marco Cecchinato in the next round.
However, Croft felt that Djokovic changed his game against Verdasco to include more loopy shots to put his opponent on the back foot – just like Nadal does.
Nadal has dominated on clay for over a decade and his rivals are now beginning to use his tactic against lesser opposition.
“When you hear Nadal talking about how he wants to put balls up high to his opponent, he wants to mess with their rhythm,” Croft told Eurosport.
“He doesn’t allow his opponents to play from comfortable positions and this is exactly what we saw from Djokovic today.
“I was intrigued by the loopier ball which Djokovic was using quite effectively.
“On paper it looked liked a very straight-forward win as he only dropped the nine games – but two-and-a-half hours – it was quite long.
“Loopy balls is what Nadal has done on clay so effectively over the years.
“If you loop balls quite high to a backhand then it is quite hard to step in and take control of the point.
“I thought it was very clever tactically but it was longer points than I thought it would be.”
Nadal is hoping to book his quarter-final spot when he taken on Maximilian Marterer on Monday.
Source : EXPRESS