Two MLS mainstays look to lock in a spot in the U.S. Open Cup Semifinals, as the Philadelphia Union take on the New York Red Bulls in the in quarterfinal action on Wednesday night.

Members of DC 33 still have to approve a tentative agreement. If they don't ratify it, union president Greg Boulware warns that a strike could resume.

District Council 33 and the Parker administration last negotiated for hours on Saturday, but the two sides weren't able to make a deal.

Philadelphia officials and members of the city's union representing blue-collar workers resumed negotiations Tuesday as residents grew increasingly frustrated with garbage piling up on the streets.

When over 200 city workers were laid off in September 1938, city workers called a weeklong sanitation strike. Street battles raged in West Philadelphia when strikers blocked police-escorted trash wagons that were aiming to collect trash with workers hired to replace the strikers.

Regular trash pickup will resume in the City of Philadelphia on Monday. Trash pickup was just one of several city services affected by the eight-day strike. Union members were told by DC 33 leadership that they need to return to work as soon as possible. Maintenance staff at city pools are back at work, but the water has yet to return.

Despite playing down a man due to a red card, Nashville SC beat the MLS-leading Philadelphia Union 1-0 on a late penalty kick goal by Hany Mukhtar.