Smith, who recently became the first British woman to reach the world's top 100 for three years, was on the verge of going 3-1 down in the decider before coming through 6-2, 0-6, 6-3 against the promising teenager. On one of the break points Collin had the whole court open and put a backhand volley into the net.
The quality of Collin's groundstrokes was nevertheless outstanding and in the middle part of the match she punished Smith with some great counter- hitting when the favourite tried to take more liberties in attack.
"She had everything to win and I had everything to lose. A lot of top seeds would have crumbled, but I didn't," Smith said.
The men's fifth seed, Martin Lee, did not escape, however. Last year's world junior No 1 went out 6-2, 7-6 in the first round to Tom Spinks, the British No 10.
Spinks, with a forehand and serve good enough to have taken Greg Rusedski the full distance here two years ago, suffered his only crisis early in the second set. However, the 22-year-old from Norfolk served an ace on break point in the second game and was never troubled on his delivery after that.Reuse content