Saturday’s action at Longchamp included a couple of Group 1s but that was just the prelude, as we have even more top-class action to look forward to in France on Sunday.Europe’s richest race, the £4,000,000 Prix de l’Arc de Triomphe, is the magnificent main event.Daryz arrived with a late effort to snatch victory from Minnie Hauk in last year’s renewal and both are set to make the line-up.British raiders Maltese Cross and the mare Kalpana are popular in the betting, with Thundering On and Varandir also single-figure prices.Our expert has picked out three strong fancies at Longchamp on Sunday, including a very talented Aidan O’Brien runner who is much better than she showed when tasting defeat for the first time on her most recent start in France.talkSPORT BET Betting Offer – Get up to £30 in free bets – CLAIM HERE*Sunday’s tips13:09 Longchamp – Folsom Blues @ 7/4 15:05 Longchamp – Diamond Necklace @ 14/1 15:50 Longchamp – Precise @ 4/1 13:09 Longchamp – Folsom Blues @ 7/4This season has been an exceptional one from Joseph O’Brien’s point of view and he looks well set to land another Group 1 with the consistent FOLSOM BLUES. This son of Blue Point could hardly have been more impressive last time out and is clearly progressive.Getting off the mark at the second time of asking, he won a Gowran maiden over 7f by a very wide margin and he was much too good for his rivals on that occasion. A couple of defeats then followed, although he lost little in defeat when second to Sun Goddess in the Phoenix.O’Brien’s colt absolutely bolted up upon his return to 7f in the National Stakes last time out and a reproduction of that form would make him very hard to beat.15:05 Longchamp – Diamond Necklace @ 14/1Sunday’s main event is the Prix de l’Arc de Triomphe and it’s one of the most important races in the world. Some exceptional horses have made it on to the roll of honour over the years and Aidan O’Brien could land the race for the third time with his filly DIAMOND NECKLACE.A daughter of St Mark’s Basilica, she’s a half-sister to eight winners, including Irish Oaks heroine Chicquita and Mackinnon Stakes victor Magic Wand. She announced herself as a future star when winning the Prix Marcel Boussac comfortably on this very card last year.Impressive in the French Oaks, she did it the hard way when following up in the Prix de Diane the following month. Her rivals had no answer in the Nassau Stakes at Glorious Goodwood, before she suffered defeat for the first time at Deauville when last seen.The yard was under a bit of a cloud then and she was well below her best on that occasion. O’Brien’s filly deserves another chance and the step up to 1m4f shouldn’t be a problem.Clearly she possesses a significant amount of ability and this is a good chance to prove it.15:50 Longchamp – Precise @ 4/1Another one for Aidan O’Brien, PRECISE really turned a corner towards the back end of last season and went on to land consecutive Group 1s in the Moyglare Stud Stakes and the Fillies’ Mile. She blew them all away when winning the latter by three-and-a-quarter lengths.The daughter of Starspangledbanner clearly needed the run in the 1000 Guineas at Newmarket, but took big steps forward to win both the Irish 1000 Guineas, accounting for True Love in the process, as well as the Coronation Stakes.Outsprinted in the Falmouth Stakes by Blue Bolt, a rival she has finished behind three times of late, all over a mile, she now looks ready to step up to 1m2f.talkSPORT BET Betting Offer – Get up to £30 in free bets – CLAIM HERE*All odds correct at time of writing.Remember to gamble responsiblyA responsible gambler is someone who:Establishes time and monetary limits before playingOnly gambles with money they can afford to loseNever chase their lossesDoesn’t gamble if they’re upset, angry or depressedGamcare – www.gamcare.org.ukFind our detailed guide on responsible gambling practices here.For help with a gambling problem, call the National Gambling Helpline on 0808 8020 133 or go to www.gamstop.co.uk to be excluded from all UK-regulated gambling websites.*18+ New customers only. Opt in deposit and bet min £10 (max £30) on any sports (odds 2.00+) within 7 days. Get your initial stake (up to £30) credited in Free Bets. Free Bets to be used on selected markets and expire in 7 days. Scroll Down for T&Cs. GambleAware.org | Please gamble responsibly