Tonight at 5:00 p.m. ET on ESPN the men's semifinals will resume when No. 1 ranked Novak Djokovic takes on No. 9 Marian Cilic in a match that fans can live stream free by clicking this link.

Djokovic was mildly challenged in his fourth match by No. 18 Feliciano Lopez, while Milic was locked in a five-set battle with No. 19 Jo-Wilifried Tsonga. Djokovic is a heavy favorite over Cilic, but it's worth remembering that Cilic, not "Djoker" is the reigning U.S. Open champion. Injuries have marred Cilic's 2015 campaign, but he is a serious threat to topple the world's top-ranked men's player.

"I feel that things are close for me, somewhere around in the air," Cilic said. "I feel that I'm really close to finding them again and playing some really good tennis.

"[Winning a major] changes, absolutely, your mind looking at the tournament. It's for sure a different approach. For me, it is a bit different understanding of going to these big tournaments than before I won a Grand Slam. Now I'm more focused on myself and know that I have the abilities to win."

He will need confidence in spades, because he has no successful history to draw from against Djokovic, who has beaten him 13 straight times.

"It's definitely the toughest match for me, toughest matchup," Cilic said. "I had close matches last few years, but I haven't found the right formula to be able to win a match. We will see."

For more content, follow us on Twitter @SportsWN or LIKE US on Facebook