Leicester were handed a lifeline when Lawrence fouled substitute Trevor Benjamin, but Izzet failed to convert.
Despite their dominance, Saints failed to convert possession into points until three minutes from time.
Fly-half Robinson failed to convert and after Mick O'Driscoll fell offside, fluffed another kickable penalty attempt.
The Flyers failed to convert on three chances and are 0 for 16 in six games.
Geordan Murphy latched onto the bounce for the try, although Stimpson failed to convert.
Radwanska broke back for 3-3, and Baltacha failed to convert a break-point chance for 5-5.
Sexton failed to convert and also pushed an injury-time penalty effort to the right of the posts.
Scotland coach Frank Hadden was left to rue missed opportunities after his side failed to convert their possession into points.
The Flyers' power play failed to convert on three chances and is 0 for 16 in six games.
Ulster pressed after the break but, unlike the visitors in the first half, failed to convert it into points.
Although Saints outscored the Wildcats by five tries to four, Wellens failed to convert any of his side's efforts.
McIndoe's miss was the fifth penalty Wolves have failed to convert this season.
But Lomax again failed to convert as Catalans held on with relative comfort.
Meli leapt highest to gather possession for a try which Lomax narrowly failed to convert from close to the touchline.
Jerome Porical failed to convert that score but was on target 10 minutes later when Candelon finished off another fine breakaway.
Silfverberg had received a second-period hooking penalty, but the Rangers failed to convert on the power play, and that was that.
Sharapova broke early against Schnyder to lead 2-1 but failed to convert three set points on her opponent's serve at 5-3.
Flood failed to convert, as he did when Youngs scorched over from 35 metres after Thomas Waldrom won possession at a tackle.
The hosts squandered a certain try on six minutes when they failed to convert a three-on-one and allowed Richard Whiting to intercept.
Granville broke at the start of the second set and Hingis failed to convert any of four break points at 3-2 down.
But although Brewerton and Sharp both failed to convert their good opportunities, Rhyl will be encouraged by the threat they posed from set-pieces.
Bristol hit back five minutes later after fine work from Brian O'Riordan helped Tom Arscott to five valuable points which Strange failed to convert.
Then, after Leinster failed to convert a couple of promising attacking situations, the Blues squared the game at 20-20 thanks to a terrific team try.
Gonzalez admitted that his chance came and went with the two break points he failed to convert when serving for the set in game 10.
Saracens started brightly but failed to convert their first real chances.
Moyes opted to replace Beckford with Anichebe and the move almost paid immediate dividends as the Nigerian stretched but narrowly failed to convert another Bilyaletdinov centre.
And as Scotland chased a winning score, Tiesi capitalised on a loose ball to run in Argentina's second try of the evening, which Todeschini failed to convert.
The Irish League champions created chances in the first half but failed to convert and Rade Prica made it 1-0 with a backpost header in the 32nd minute.
Keatley left the Scots reeling, five minutes in, when he intercepted a pass on the 10-metre line and darted over for a try which he failed to convert.
Soderling, who had won six of their previous nine meetings, failed to convert two break points of his own in the next game and the set went to a tie-break.
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