Nyree Lewis missed out on another Paralympic gold when she came second in the women's SB5 100m breaststroke.
By Elizabeth Hudson
BBC Sport in Athens
Lewis, who won gold in the S6 100m backstroke earlier in the week, was almost a second and a half behind German Kirsten Bruhn.
But she was disappointed with only winning silver this time around in a time of one minute 54.48 seconds.
"That was a dreadful swim and I should have done a better time than that," she admitted afterwards.
"I know the way Kirsten swims and she always goes out quick," added Lewis, who turned in fourth place before recovering a little over the second 50m.
"I've had problems with my shoulder which has affected my training for the event but overall I'm disappointed with how this race went."
Meanwhile, Liz Johnson and the 4x50m relay team helped Great Britain's win more medals in the pool.
Johnson took silver in the SB6 100m breaststroke finishing just under four seconds behind Australian Sarah Bowen.
Meanwhile, the 4x50m 20pts final produced a sterling effort from Great Britain's quartet that saw them pip the United States for second spot.
Rhiannon Henry was fourth in the women's 200m individual medley SM13 final while Jemma Houghton found the going difficult in the women's 100m freestyle S12 final, finishing eighth.
Sarah Bailey came fifth in the 400m freestyle S10 final.
Elaine Barrett, who earlier in week won gold in SB11 breaststroke, finished seventh in women's S11 100m freestyle.