The field is now set for the Fourth Round of the 2017 U.S. Open Cup, and each of the US-based MLS clubs entering the tournament know their respective opponent.
While there will be three all-MLS games in the fourth round, including an all-New York showdown and a Cascadia clash, the matches between MLS sides and lower division clubs includes the lone amateur team left in the field, Maryland-based side Christos FC, who will play D.C. United.
There are also several games featuring MLS teams playing former USL affiliates, including the New England Revolution hosting the Rochester Rhinos, Philadelphia Union playing the Harrisburg City Islanders, and Saint Louis FC hosting the Chicago Fire.
On top of that, one current MLS-USL partnership will turn competitive, as Atlanta United FC host the Charleston Battery.
FC Dallas, the reigning champions, will kick off their title defense with a home game against the USL's Tulsa Roughnecks.
You can find the full schedule for the fourth round below.
| 2017 US Open Cup Fourth Round – June 13-14 | |||
|---|---|---|---|
| Tues., June 13 @ 7:30 ET | D.C. United vs. Christos FC (amateur) | Maryland SoccerPlex | Boyds, Md. |
| Tues., June 13 @ 10:30 ET | Seattle Sounders FC vs. Portland Timbers | Starfire Sports Complex | Tukwila, Wash. |
| Tues., June 13 @ 9:00 ET | Colorado Rapids vs. Oklahoma City Energy FC (USL) | Dick's Sporting Goods Park | Commerce City, Colo. |
| Wed., June 14 @ 7:00 ET | FC Cincinnati (USL) vs. Columbus Crew SC | Nippert Stadium | Cincinnati, Oh. |
| Wed., June 14 @ 7:00 ET | Saint Louis FC (USL) vs. Chicago Fire | Toyota Stadium | Fenton, Mo. |
| Wed., June 14 @ 7:30 ET | New England Revolution vs. Rochester Rhinos (USL) | Chapey Field - Providence College | Providence, R.I. |
| Wed., June 14 @ 7:30 ET | NY Red Bulls vs. New York City FC | Red Bull Arena | Harrison, N.J. |
| Wed., June 14 @ 7:30 ET | Philadelphia Union vs. Harrisburg City Islanders (USL) | Talen Energy Stadium | Chester, Pa. |
| Wed., June 14 @ 7:30 ET | Atlanta United FC vs. Charleston Battery (USL) | Fifth Third Bank Stadium | Kennesaw, Ga. |
| Wed., June 14 @ 7:30 ET | Orlando City SC vs. Miami FC (NASL) | Orlando City Stadium | Orlando, Fla. |
| Wed., June 14 @ 7:30 ET | North Carolina FC (NASL) vs. Houston Dynamo | Sahlen's Stadium | Cary, N.C. |
| Wed., June 14 @ 7:30 ET | Sporting Kansas City vs. Minnesota United FC | Children's Mercy Park | Kansas City, Kan. |
| Wed., June 14 @ 8:00 ET | FC Dallas vs. Tulsa Roughnecks FC (USL) | Wescott Field | Dallas, Tex. |
| Wed., June 14 @ 10:30 ET | Sacramento Republic FC (USL) vs. Real Salt Lake | Papa Murphy's Park | Sacramento, Calif. |
| Wed., June 14 @ 10:30 ET | LA Galaxy vs. Orange County SC (USL) | StubHub Center Track & Field Stadium | Carson, Calif. |
| Wed., June 14 @ 10:30 ET | San Jose Earthquakes vs. San Francisco Deltas (NASL) | Avaya Stadium | San Jose, Calif. |
