Leyton Orient had to rely on a stunning display by goalkeeper Glyn Garner to secure their 1-0 win over Cheltenham.
Paul Connor got the O's winner, volleying home Joe Keith's knockdown from 12 yards.
But Brian Wilson fired over the bar when well placed for the Robins and then missed again from close range.
Cheltenham pushed forward but Garner made a string of fine saves, including an athletic stop from Steven Gillespie and he twice denied Grant McCann.
Leyton Orient: Garner, Miller, Lockwood, Tann, Zakuani, Demetriou (Barnard 67), Keith, Simpson (McMahon 61), Easton, Connor, Ibehre (Alexander 78). Subs Not Used: Steele, Morris.
Booked: Lockwood, Garner.
Goals: Connor 23.
Cheltenham: Higgs, Gill, Armstrong, Caines, Townsend, Wilson (Spencer 72), Bird, Finnigan, McCann, Guinan (Odejayi 54), Gillespie. Subs Not Used: Brown, Wylde, Bell.
Ref: K Wright (Cambridgeshire).