Novak Djokovic faces Dominic Thiem at The O2 on Sunday as he begins the defence of his World Tour Finals title and his pursuit to reclaim the world No 1 ranking. Hydro Flask Clearance Online . Djokovic saw his 122-week hold on top spot ended last weekend when he was usurped by Andy Murray as the worlds top ranked player. World No 1 permutations How the No 1 ranking can change hands...again Having previously admitted that his desire and love for the game had waned, it may be that this latest development adds fuel to the Djokovic fire as he looks to win a sixth World Tour Finals and end the season on top of the standings once again. The 29-year-old has won the season-ending event the last four years and is a two-time Grand Slam champion this year, winning the Australian and French Opens to take his career tally to 14 major titles. Djokovic has endured a frustrating second half of the season and has lost his world No 1 ranking to Andy Murray He also owns a dominant 23-0 record against his three rivals in the Lendl group and first to challenge that will be the youngest man at this weeks finals - Thiem. Ivan Lendl Group Novak Djokovic (Serbia) Milos Raonic (Canada) Gael Monfils (France) Dominic Thiem (Austria) World Tour Finals: Profiles We look back on the year so far for the eight contenders Thiem too has had his struggles over the second half of the year but claimed four titles over the course of the regular season The Austrian is making his debut at the event and after a sensational start to 2016, tailed off over the second half of the year.He has never won a set against Djokovic, losing all three meetings including their most high-profile encounter at the French Open semi-final earlier this year where Djokovic won 6-2 6-1 6-4.In recent weeks the 23-year-old has suffered surprise defeats to Jack Sock, Viktor Troicki and Alexander Zverev and has not gone beyond a quarter-final since the middle of September. Introducing the underdogs What do we know about debutants Dominic Thiem and Gael Monfils However Thiem is not to be underestimated having claimed four titles this year, only Murray (eight) and Djokovic (seven) have won more although the last of those came back in June.Djokovic too has wobbled since his dominant first half of the year - he has been beaten by Marin Cilic and Roberto Bautista Agut since using the US Open final to Stan Wawrinka and he has won just one title since completing his career Grand Sam at Roland Garros and that came with victory at the Rogers Cup in Toronto in July.Whether Thiem can capitalise remains to be seen but the opening singles match of the tournament promises to be an intriguing one. World Tour Finals: The Groups We run through the contenders and their groups at The O2 As is the case for every session the doubles will kick off the action from 12pm on Sky Sports and the first match of the week will see Mike and Bob Bryan taking on Ivan Dodig and Marcelo Melo. Edberg/Jarryd Group Bob Bryan & Mike Bryan Ivan Dodig & Marcelo Melo Jamie Murray & Bruno Soares Treat Huey & Max Mirnyi Bob and Mike Bryan are five-time winners of the season-end doubles event The American brothers are seeded third this year and are four-time champions of the event but come into the tournament on the back of two years without a major title.They face sixth-seeded pair Dodig and Melo who have won the last two Masters events they have entered in Cincinnati and Canada.All the action from the O2 between November 13-20 will be live on Sky Sports across the week and if you are out and about you can follow on our Sky Sports apps and the website via our live blogs. Full schedule here. Live Tennis: ATP World Tour Finals November 13, 2016, 12:00pm Live on Get Sky Sports Get a Sky Sports pass Also See: The Groups Shots to watch Tour Finals at The O2 Panel Predictions Clearance Hydro Flask . The lightning strike was in the parking lot of Crew Stadium on Saturday night, but its not known if the off-duty lieutenant was struck directly, Columbus Fire Department Battalion Chief Tracy Smith said. The firefighter, identified as Lt. Hydro Flask Online Sale . McCutchen hit his first home run in over a month, doubled twice and scored two runs to help the Pirates beat the Los Angeles Dodgers 5-3 on Sunday and take three of four from the defending NL West champions. http://www.clearancehydroflask.com/ . Ricciardo made it only halfway around the Jerez track before his RB10 rolled to a stop and began spouting smoke from the back. After team mechanics tended to the car, Ricciardo went back out for a mere two trips around the circuit before calling it quits.Newark, NJ (SportsNetwork.com) - Having just handedly taken down Xavier, the Butler Bulldogs will look to try and ride a wave of momentum as they face the 21st-ranked Seton Hall Pirates in a Big East Conference bout at the Prudential Center. Butler beat Xavier with relative ease, 88-76, on Saturday to improve to 12-5 on the season with a 2-2 mark in conference play. The win over Xavier came just days after a loss to Providence (66-62), while the Musketeers took down Seton Hall (69-58). Seton Hall suffered that loss to Xavier last Wednesday, which ended the teams three-game win streak. The Pirates rebounded nicely on Saturday with a tight 68-67 victory over Creighton on the road to push the teams record to 13-3 and 3-1 in conference. Seton Hall is a perfect 8-0 at home in 2014-15. This clash will be just the fourth in the all-time series between Butler and Seton Hall. The Bulldogs own a 2-1 record over the Pirates. The sides met all three times last year, as Butler won both regular-season matches, before the Pirates took one in the Big East Tournament. Xavier boasts the best scoring offense in the Big East Conference this season, but the Bulldogs made sure the Musketeers wouldnt be the ones shooting the lights out on Saturday. Butler connected on 48.1 percent of its shots in the game, which included a 64 percent shooting touch in the second half that allowed the Bulldogs to bury their foes. Andrew Chrabascz tallied 19 points to lead the team in scoring, while Kameron Woods notched a double-double of 13 points and 11 rebounds in the win. Roosevelt Jones added 16 points, Alex Barlow chipped in with 15 and Kellen Dunham contributed 10 points. He scored the fewwest number of points out of any other starter Saturday for Butler, but Dunham still comes into Tuesdays matchup leading the team in the scoring category at 16. Hydro Flask Sale Ombre. 6 ppg on 44.3 percent shooting. For an offense that broke out against Xavier for 88 points, the Bulldogs are still netting just 70.9 ppg this season. The only other player on the team with a double-digit scoring average headed into Tuesday is Jones, who is netting 11.6 ppg. Woods chips in a team-best and conference-best 9.1 rpg mark, and Joness 4.1 apg is the highest total in the category for the Bulldogs. Sterling Gibbs, who has been known to play the role of hero for Seton Hall in the past, was up to his old tricks again on Saturday, as the junior buried a 3-pointer with 2.1 seconds to play against Creighton that lifted his Pirates past the Bluejays by a single point. Seton Hall shot just 9-of-26 from 3-point range in the win, with Gibbss biggest shot coming at the very end. Gibbs led the team in scoring with 22 points in the win, while Khadeen Carrington chipped in with 11 points for the Pirates. Brandon Mobley pulled down a team- high 13 rebounds in the win. Seton Hall comes into Tuesdays matchup scoring almost the exact same number of points on average as the Bulldogs. The Pirates check in at 70.6 ppg this season, and are allowing opponents to net just 61.7 ppg on 39.7 percent shooting from the floor. Gibbs has been sensational in his junior season, averaging 16.4 ppg and adding in 63 assists to lead the Pirates. Isaiah Whitehead (11.9 ppg) and Mobley (10.0 ppg) round out a trio of double-digit scorers for Seton Hall. Angel Delgado leads the squad with an 8.7 rpg mark. ' ' '