2017 Us Open Tennis Championships has stepped into its second week at Flushing Meadows in New York. The bottom half of the men's draw is down to the quarterfinals. On the bottom half, where some big names are still alive in the contest, the fourth round's session is scheduled for today.

Roger Federer and Rafael Nadal the highest seeds left in the contest but they are not alone as Juan Martin del Potro, or Dominic Thiem will try to make their own bid in what has been a very had to predict contest. Thus, Rafael Nadal will face the unseeded Ukrainian Alexandr Dolgopolov for a place in the quarterfinals while his rival Roger Federer [VIDEO] is set to play Philipp Kohlschreiber (37 ATP) of Germany.

The 36-year-old Swiss will have another test against a player that is looking for a first success over him.

Federer seems to gather some momentum after a hesitating start

Surviving two five sets thriller in the first two rounds of 2017 US Open was an unexpected way to start a bid for the sixth US Open title and the first one since 2008. But Federer is not like any other player as he seemed have put things in order in the round of 32. Having to deal with Feliciano Lopez of Spain, he did fewer mistakes and topped his opponent in straight sets.

The next challenge is an old veteran of the ATP tour. The 33-year-old Kohlschreiber is yet to win a match against Federer, but that doesn't mean he should be considered a done deal. Just remember how hard Youznhyi fought and how close he came to overcome Federer.

In head to head stats, Federer leads the German player by 11-0. It's been almost two years since they last met (2015 Basel). Although it seems an easy peak, Federer should not allow getting his both feet into the game. If he gets past him, the next challenge is expected to bring in a certain level of excitement as he will face the winner of Thiem vs. del Potro collision.

Federer and Nadal doesn't look in perfect shape

When the draw came out, a first ever Federer vs. Nadal [VIDEO] matchup in New York was on everyone's lips. Now, they're two matches away from fulfilling that prediction. But, both look a bit rusty at 2017 US Open. Also, they can call themselves lucky persons as most of the potential early threats went out unexpectedly. If Federer may have a tricky match in the last eight stages, Rafael Nadal will take on the winner of David Goffin vs. Andrey Rublev.

The Spaniard has had his own issues in New Yostrugglinglin to find pace despite playing on a slower surface compared to the previous editions.