Morgenstern defeated UConn's Ricardo Cardona, 7-5, 6-1, in the first round before getting past Villanova's Andrew Adler, 6-4, 6-1, in the quarterfinals. He'll face Fairfield's Erik Kremheller in tomorrow's semifinals.
Mikkelson defeated Hartford's Aneil Bhalla, 6-4, 6-2, in the first round of Flight A, before falling to UConn's Andrew Marcus, 4-6, 7-5, 10-6, in the quarterfinals.
Francis beat Hartford's Joel de los Santos, 6-2, 6-1, in the Flight B first round, before falling to UConn's Ryan Carr, 6-2, 6-2.
Nelson defeated Luccas Coutinho of St. Peter's, 6-4, 6-2, in the Flight C opening round, before being edged by Fairfield's Bjorn Merinder, 5-7, 6-1, 12-10, in the quarterfinals.
Lazerowich defeated Hartford's Eric Floum, 6-3, 6-1, in the Flight C opening round, before falling to Fairfield's Kremheller, 6-0, 6-3, in the quarterfinals.
After falling to Fairfield's Reece Breault, 7-6, 6-1, in the opening round of Flight D, Shapiro defeated Hartford's Filip Miletic, 8-1, in the consolation bracket.
Quinnipiac Invitational singles semifinal and championship matches will commence at 9 a.m. tomorrow.