Godolphin's 2000 Guineas favourite Pinatubo is the star attraction on the second day of Irish Champions Weekend at the Curragh as he headlines a field of eight in the Goffs Vincent O'Brien National Stakes.

The Charlie Appleby-trained youngster won the Chesham at Royal Ascot back in June and has since added the Vintage Stakes at Goodwood in even more impressive fashion by five lengths.

He is bidding for a fifth straight win on Sunday, but will not have it easy against Aidan O'Brien's Armory and Arizona.

The former won the Futurity Stakes last time out, while the latter won the Coventry at Ascot but was beaten in the Prix Morny on his last outing.

Jim Bolger's Geometrical and Mark Johnston's Monoski are also in the mix.

A total of 10 will line up for the Comer Group Irish St Leger, with Melbourne Cup hero Cross Counter making the journey across for Appleby.

O'Brien has a very strong hand with last year's Doncaster St Leger winner Kew Gardens, 2017 Irish Derby and Leger hero Capri and Southern France among his four runners.

His son Joseph runs last year's Irish Derby winner Latrobe, Master Of Reality and Twilight Payment.

Dermot Weld's Search For A Song and Sylvester Kirk's Salouen complete the field.

The Derrinstown Stud Flying Five has 12 runners and looks wide open, in the absence of Battaash.

Soldier's Call and Mabs Cross have been finishing just behind the likes of Blue Point and Battaash this summer, and without those two in opposition, connections of both will be hopeful of claiming Group One honours.

Houtzen, a smart addition to the Martyn Meade stable, has her first run since finishing second to Battaash at Goodwood.

Jessica Harrington's unbeaten Albigna is the star in the Moyglare Stud Stakes, in which she faces Roger Varian's Albany Stakes winner Daahyeh.

Aidan O'Brien runs four - with Love, Precious Moments, So Wonderful and Tango lining up.

James Tate's Under The Stars and the Ger Lyons-trained Soul Search are also among a field of nine.

The Pat Smullen Champions Race for Cancer Trials Ireland at 4.50pm is race seven on a bumper nine-race card, and features some living legends taking to the saddle.

Paul Carberry, Charlie Swan, Ted Durcan, Kieren Fallon, Richard Hughes, Tony McCoy, Johnny Murtagh, Joseph O'Brien and Ruby Walsh will all take their mounts for the race which has been created by nine-time Irish champion jockey Pat Smullen to increase awareness of pancreatic cancer and to raise much-needed funds for upcoming cancer trials.

"I’m so grateful to these lads for coming out of retirement to ride in the race, it looks like the race of a lifetime and I’m just disappointed that I can’t ride in it!

"I know that it has meant a few gruelling weeks for some of them as they get fit for it and I really do appreciate it," said Smullen."This race will hopefully raise awareness of pancreatic cancer but it is also going to contribute to our goal this weekend of raising as much money as possible for Cancer Trials Ireland, who have two vital cancer trials ready to go."

Follow Longines Irish Champions Weekend live on RTÉ.ie/sport, the News Now app, RTÉ One television and RTÉ Radio 1 on Saturday 14 September and Sunday 15 September.