Interesting seeing new faces at Wimbledon second week: Djokovic

World No.1 tennis player Novak Djokovic says seeing new faces break through to the second week at Wimbledon is positive for the sport.

A total of seven players who will contest the pre-quarterfinals Monday are unseeded.

"It is a surprise, there's no question about it. It's a strange feeling not to have (Roger) Federer or (Rafael) Nadal at the second week of a major. There are some players who have been playing great tennis. I think it's interesting also to see new faces for the crowd and the tennis world in general," the top seed was quoted as saying by atpworldtour.com Saturday.

The Serb, who has not dropped a set in his first three matches, faces German 13th seed Tommy Haas in the fourth round.

"Tommy is full of confidence on the court. You wouldn't expect him to play quarterfinals of French Open with his game because clay is not his surface, but he did. He's proven everybody wrong because he's so fit and he moves around the court really well, is very solid from both sides, on the baseline, has a great serve and variety in his game which is perfect for grass," said Djokovic.

On his own form the 26-year-old said: "Every opponent I'm going to face is going to be more difficult. I'm striking the ball really well and have great balance on the court."