"I just wish he had a better barrier draw because we would like to ride him for a little bit of cover," he said.
"We are probably going to have to come back a little further than we want to, just to try and get some cover with him."
The Group One feature has attracted a small but select field, with Harlech a $2.40 favourite with TAB bookmakers ahead of Travelling Light at $2.90, with Riodini the third-favourite at $3.40.
"It's a shame that for a Group One 3-year-old race you can only get seven runners [now six with the scratching of Holy Mongolemperor] but it's a good field," Tiley said.
Riodini is set to have a freshen-up before his next assignment, which could be the group one BCD Sprint (1400m) at Te Rapa next month. "I am going to drop him off for a few days break at Rich Hill Stud on the way home," Tiley said.
"Depending on how he runs and how he comes through Saturday there is a possibility we might have a look at that 1400m group one race at Te Rapa with him."
Stablemate Ride The Wave will accompany Riodini on his Trentham trip where he will tackle the Raceform Premier (1200m).
The 4-year-old gelding finished unplaced over 1500m at Ellerslie on Boxing Day and Tiley is hoping for a better result over the 1200m trip.
"He has learnt how to race now and I think he is just getting too strong," he said. "We have just dropped him back in distance to see whether he might only be a 1200m horse. I am pretty optimistic that he is going to be hard to beat. He has drawn barrier three, so hopefully they will run along a bit and he will be doing his best work at the finish."
- NZ Racing Desk