The European Tour heads to the UAE for the DP World Tour Championship this week with the Race to Dubai still very much up for grabs.Four players -- Henrik Stenson, Danny Willett,?Alex Noren?and Rory McIlroy -- will stand on the first tee at Jumeirah Golf Estates on Thursday with a chance to finish the week cradling the mammoth order of merit trophy.But what do each of them have to do to make that dream a reality? ESPN takes a look at the permutations.Henrik StensonCurrent rank: 1Race to Dubai points: 4,000,563What he needs to do: The Open champion has his destiny in his own hands, knowing that a top-nine finish in Dubai will effectively secure European bragging rights for the second time in his career. If closest challenger Danny Willett wins the DP World Tour Championship, though, Stenson cannot secure the Race to Dubai. The Swede is comfortable in the emirate, having lived there until 2012, but a horror first-round 77 12 months ago may play on his mind as he walks to the first tee on Thursday.Danny WillettCurrent rank: 2Race to Dubai points: 3,700,888What he needs to do: Willetts form has been patchy since he won the Masters last April, however, the Englishman has a very clear goal heading into the final event of the season. Win the DP World Championship and he will also claim the Race to Dubai, regardless of how Stenson fares. Willetts best finish since the Masters, though, was second at the Italian Open last month. Match that result and the Race to Dubai is his as long as neither Stenson nor Alex Noren win this week.Alex NorenCurrent rank: 3Race to Dubai points: 3,367,126What he needs to do: The form player heading into the final week, having won four of his last 11 European Tour events. Another victory for Noren in the UAE could well see him end the year as the Race to Dubai champion, as long as countryman Stenson isnt runner-up. If Noren finishes second in Dubai then he will finish the year atop the European standings as long as Stenson is outside the top eight and Willett does not win.Rory McIlroyCurrent rank: 4Race to Dubai points: 2,824,149What he needs to do: The world No. 2 is still mathematically in the Race to Dubai, but he will need his stars to align if he is going to land a third successive order of merit crown. In many ways that makes the Ulstermans task simple; he must win. But even then, the DP World Tour Championship title might not be enough. If McIlroy does win at Jumeirah Golf Estates then he will need Stenson to finish outside of the top 45, Willett outside of the top five, and Noren lower than second. Cheap Air Jordan 4 Australia . LOUIS -- Mike Smith is used to facing plenty of shots, so this was nothing new. 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OMAHA, Neb. -- Katie Ledecky set herself up to swim a third individual event in Rio, qualifying fastest for the 800-meter freestyle at the U.S. trials Friday.The Maryland teenagers time of 8 minutes, 10.91 seconds in the preliminaries was third fastest in the world this year. She owns the 10 leading times in the events history. Ledecky made a name for herself by winning the 800 free four years ago in London.She is already on the team in the 200 and 400 free. Ledecky is in line to match Debbie Meyers sweep of the 200, 400 and 800 freestyles at the 1968 Mexico City Olympics. Shane Gould of Australia won the 200 and 400 free in world-record time at the 1972 Munich Games, and finished second in the 800 free.Ledecky has the 100 free final Friday night and returns Saturday for the 800 free final.I dont think Ive done this before, 800 free prelims and then a big-time 100 free final, she said. Itll be fun. A little different.Leah Smith, already on the team in the 400 free, qualified second fastest for the 800 free in 8:21.64 -- 10.73 seconds behind Ledecky.Michael Phelps was back in the pool for the 100 butterfly heats, where he qualified sixth fastest in 51.87 seconds. Ryan Lochte was ninth to move into the 16-man evening semifinals, but will not swim.Lochte was focused on the 200 individual medley final Friday night, where he and Phelps were to resume their long rivalry. The topp two finishers qualify for Rio.ddddddddddddPhelps has a busy night ahead. Hell swim the 200 IM final and return about 30 minutes later for the 100 fly semis.The fastest qualifier in the 100 fly was Matthew Josa in 51.61. He swims at Division III Queens University in his hometown of Charlotte, North Carolina.Missy Franklin topped the 200 backstroke heats in 2:09.69. Maya DiRado, already on the team in the 200 and 400 IM, goes for a third individual event. She was second fastest in 2:09.76. They moved on to the evening semis.Olympic newcomer Caeleb Dressel led a veteran field in the 50 free heats with a time of 21.76. Anthony Ervin, the 200 Olympic champion, was second in 21.80. Cullen Jones, silver medalist in London, was third at 21.84 to make the semis.It means a lot to be able to hold your own against these young guys, said Jones, who is 32.He failed to qualify in the 100 free and was shaken after friend Matt Grevers missed out in the 100 back as the defending Olympic champion.But I had to put that aside, Jones said. I had to think about how I wanted to go out, how I wanted to do everything I planned on doing. I put too much work in this year to not put up a good time.Nathan Adrian, the 100 free winner at trials, also advanced fourth in 21.96. ' ' '