Three former University of Michigan athletes took part in races at Olympic Stadium in London on Wednesday.

Geena Gall advanced to the semifinals of the women’s 800-meter run while two other former Wolverines failed to advance from the semifinals of their events to an Olympic final.

Jeff Porter finished fifth in his heat of the 110-meter hurdles semifinals in 13.41 seconds. Fellow Americans Aries Merritt (12.94) and Jason Richardson (13.13) won their heats to and won the gold and silver medals, respectively, in the final. Hansle Parchment of Jamaica won the bronze.

Porter, who won an NCAA championship in the 60-meter hurdles in 2007, is married to former Ypsilanti High School and Michigan standout Tiffany (Ofili) Porter. Representing host Great Britain, she missed reaching the final of the 100-meter hurdles by .08 seconds on Tuesday.

Nicole (Edwards) Sifuentes, who lettered at Michigan from 2005-08, represented Canada in the 1,500 run semifinals and finished 11th in her heat.

Gall finished fourth in her heat of the 800, missing an automatic bid into the semifinals, but advanced with the sixth-fastest time (2:03.85) of the non-automatic qualifiers from six heats.

Fellow Americans Alysia Johnson Montano (2:00.47) and Alice Schmidt (2:01.65) also advanced to Thursday’s semifinals.