Jairo Arrieta, above playing against Toronto on June 27, scored the only goal of the match for D.C. United in its U.S. Open Cup match against the Philadelphia Union. (Frank Gunn/Associated Press)

From staff reports

Eric Ayuk Mbu tied it up early in the second half, and Fabinho netted the game-winner in the 79th minute as the Philadelphia Union rallied from a first-half deficit to earn a 2-1 victory over D.C. United in Chester, Pa., on Tuesday night in the U.S. Open Cup.

With the win, the Union advanced to the tournament quarterfinals, where they will face the winner of Wednesday’s New York Red Bulls-New York Cosmos match.

Coming on in the 67th minute for Philadelphia, Fabinho beat United goalkeeper Andrew Dykstra, who was playing in place of regular starter Bill Hamid, for the go-ahead goal in the 79th. Ayuk leveled the game in the 56th minute off a cross from Sheanon Williams to set up Fabinho’s winner.

Jairo Arrieta scored the only goal of the game for United, a one-timer in the 27th. After going down a score, Markus Halsti gave United life with a blast in the 83rd that caromed off the crossbar.

The match was delayed in the 15th minute when thunder and driving rain forced players into the locker rooms for 45 minutes.

When the sides reemerged, the Union quickly went down a man when C.J. Sapong was given a red card in the 24th minute.

United capitalized three minutes later as Arrieta scored off a cross from Miguel Aguilar. It would be the only offense of the game for United, which take on the Sounders in an MLS match in Seattle on Friday.

ORLANDO CITY 2, CREW 0: Kaka and Carlos Rivas each scored a goal in the first half, and netminder Tally Hall and the Orlando City defense completed a shutout of Columbus in Orlando to advance to the U.S. Open Cup’s quarterfinal round.

Kaka opened the scoring in the 21st minute, as the Brazilian star buried his ninth goal of the season for the expansion club making its first U.S. Open Cup run. Rivas made it 2-0 with 11 minutes to go in the first half with a one-timer from 25 yards.

●FIRE 3, INDEPENDENCE 1: Mike Magee netted two goals, and host Chicago scored three straight to overcome an early deficit against Charlotte to reach the U.S. Open Cup quarters.

Magee netted the 1-all equalizer for the Fire in the 37th and an insurance goal in the 82nd. Lovel Palmer scored the game-winner in the 50th for Chicago.

For the Independence, which plays in the United Soccer League, Tomasz Zahorski scored the only goal of the game.