TasNetworks will be upgrading and replacing power poles along the adjacent Spreyton Main Rd on Sunday which will interrupt power supply and cause some delays for patrons entering the track.

However Tasracing has organised three portable generators to service the main areas of the course and, apart from a couple of restrictions, it should be business as usual.

Devonport Racing Club chairman Barry Milton said there had been an option to move the meeting to Saturday without Sky 1 coverage but it would have impacted on betting turnover.

"Tasracing wanted to stay with Sky 1 on Sunday because turnover is great at the moment apparently, with punters obviously having confidence in the Tapeta form," Milton said.

"I've been told turnover in July was up a massive 95 per cent."

It's been known for two months that the power works would take place this weekend and Tasracing tried to avoid the situation by programming the meeting for Elwick.

However when the Elwick track was deemed unsuitable for racing before October 4, the meeting was relocated to Spreyton.

Milton said that as well as likely traffic delays and congestion, patrons needed to be aware that the upstairs level of the Birdcage Tavern would be closed but downstairs seating would be available.

A food van would be brought in to meet catering needs.

There are nine races programmed for Sunday, attracting 121 nominations.

The open sprint over 1150m is the only race light on for numbers (six).

Trainers with long-time maidens in their stable have a lucrative incentive to send them to Victoria next month.

If they've had sufficient failures there's a chance they could get a run in The Hotham at Ballarat on October 9.

Entry to Victoria's richest maiden, worth $75,000, is decided by reverse ballot order.

In other words, horses that have had the most starts without winning are first into the field.

The novelty race has been run since 2017 when Tasmanian trainers Leon, Dean and Trent Wells picked up a $27,500 first prize with Woohoo.

Woohoo had been a 19-start maiden going into the race and was retired seven starts later without adding to her record.

Stakemoney has been increased by 50 per cent this year, with the winner taking home $41,250.

Brighton-based reinsman Troy McDonald continued his climb up the drivers' premiership with another treble in Hobart on Sunday night.

McDonald celebrated his birthday with wins on Hezatoff, Punchinello and Tarleton Riley to move to 47 victories for the season.

With 3-1/2 months remaining, it's the tightest premiership race for many years with the top seven drivers all well in contention.

Rohan Hillier leads with 55 wins from Gareth Rattray on 54, Conor Crook, 53, Ricky Duggan 52, McDonald 47, Mark Yole 46 and Todd Rattray 43.

As is often the case with McDonald's winners, they were all at good odds, starting at $26, $7.50 and $10 respectively.

He has driven 11 winners at the past six meetings at an average price of close to $10.

The heats of the 2YO Sweepstakes for colts and geldings in Hobart on Sunday night both had all-the-way winners, emphasising the importance of the barrier draw for the $20,000 final in a fortnight.

Stormy Sanz had to work early to hold the lead in the first heat and actually looked like being crossed by Franko Joe until the $3.40 favourite broke.

He was then challenged from the 400m mark but the Kent Rattray-trained gelding kept finding and got home by almost two metres in 1:59.4.

Rocknovertime found the front fairly easily in the second heat and trainer-driver Paul Hill let him run along as he cruised to an 18m victory in 1:59.

The fillies' division of the Sweepstakes had only enough runners for a prelude and again the winner, Melnrowley, led all the way to score by 8m in 2:02.2.

She recorded a slower overall time than the males but the lesser tempo allowed her to run the quickest last 400m of any race on the night (27.7 seconds).

Her trainer Craig Hayes believes the draw will also be the key to the fillies' final, telling the Tasracing web site that "there is not much between three or four of them so whoever draws best will be hard to beat."

Outstanding Aston Dee Bee-sired sprinter Wynburn Sheean headlines the semi-finals of the Devonport Breeders Classic on Tuesday.

The Ben Englund-trained excitement machine goes into the series off a sensational 25.41 qualifying trial heat win and will start a red hot favourite for semi-final three.

Another of the more intriguing runners is debutant Recall for Brighton-based trainer Jack Jury.

The son of American sire Superior Product and Princess Roman debuts off a slick 25.66 qualifying heat win.

"Recall is a talented pup and he continues to impress me with what he's showing in trials," Jury said.

"Heading into the heats the previous weekend I wasn't exactly sure what to expect because he was up against a dog that had won a few races already.

"But to win the way he did in that time was fantastic."

Jury is hopeful the wide draw will help the sprinter's chances of qualifying for the final. "He should begin cleanly and hopefully get a cart across towards the rails," the trainer said.