Backers plunged in undaunted for the filly in the Greig Middleton ISA Maiden Stakes despite the Newmarket stable's failure to notch even a single success so far this season.
Several four-figure bets for Sweet Sorrow resulted in her being forced down from even-money to 8-13 at the off.
Ray Cochrane was entrusted with the ride and he soon had the favourite at the head of affairs. There was a momentary cause for concern in the straight as Copernicus launched a challenge.
But all was well in the end as Sweet Sorrow stayed on strongly to defeat the challenger by two and a half lengths.
"We've had to come a long way but it's great to get that first winner," said Wall. "The horses haven't really been running that badly.
"We've just been unlucky - there's been five seconds and several have been pipped in photo-finishes.
"It's good to win with this filly as she is well-bred and now we'll be looking for some black type although that might be a tall order."Reuse content