The last grand slam of the year -- US Open -- is here upon us and the competition amongst top tennis players is expected to be top notch at the USTA Billie Jean King National Tennis Center in Flushing Meadows.

Novak Djokovic, Roger Federer, Andy Murray, Rafael Nadal are the big stars in the men's arena, while Serena Williams, Simona Halep, Caroline Wozniacki make up in the women's competition. However, another huge contender Maria Sharapova has pulled out of the US Open.

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Novak Djokovic has been in top form this season, winning the Australian Open, Wimbledon and finishing runners up in the French Open. The Serbian and world number one Djokovic will be eager to win the US Open for the second time in his career.

But Djokovic is going to face huge competition in the form of Roger Federer, who has been one of the most successful players in the US Open with five titles in his illustrious career.

The Swiss maestro comes into the US Open with full confidence after having defeated Djokovic in the finals of the Cincinnati Masters last week. These two stalwarts of the modern era can only meet in the title decider.

Apart from Djokovic and Federer, Rafael Nadal, Andy Murray, Kei Nishikori, Stan Wawrinka are going to be huge players as they have been performing consistently during the season. Wawrinka has even defeated Djokovic in the finals of the French Open.

In the women's arena, Serena Williams has had an incredible grand slam year so far as she has won all the grand slams and will be eager for a clean sweep as she looks to defend her US Open crown as well. The US Open has been a happy hunting slam for the local favourite with six titles to her name, including title wins in the last three edition of the competition.

Stars such as Ana Ivanovic, Halep, Lucie Safarova and Caroline Wozniacki will be eager to stop her dominance in women's tennis, which is a humongous ask considering the form she has shown in the year.

Though the singles event is always watched with keen interest, other disciplines such as women's doubles, men's doubles and the mixed doubles also provide an interesting contest. Sania Mirza/Martina Hingis and Bob Bryan /Mike Bryan are favourites in the women's and the men's doubles competition respectively.

Here is a look at how the men's and the women's singles start their US Open campaign.

Men's Singles

1* Novak Djokovic vs. Joao Souza
2 Roger Federer vs. Leonardo Mayer
3 Andy Murray vs. Nick Kyrgios
4 Kei Nishikori vs. Benoit Paire
5 Stan Wawrinka vs. Albert Ramos-Vinolas
6 Tomas Berdych vs. Bjorn Fratangelo
7 David Ferrer vs. Radu Albot
8 Rafael Nadal vs. Borna Coric
9 Marin Cilic vs. Guido Pella
10 Milos Raonic vs. Tim Smyczek
11 Gilles Simon vs. Donald Young
12 Richard Gasquet vs. Thanasi Kokkinakis
13 John Isner vs. Malek Jaziri
14 David Goffin vs. Simone Bolelli
15 Kevin Anderson vs. Andrey Rublev
16 Gael Monfils vs. Illya Marchenko
17 Grigor Dimitrov vs. Matthew Ebden
18 Feliciano Lopez vs. Nikoloz Basilashvili
19 Jo-Wilfried Tsonga vs. Jarkko Nieminen
20 Dominic Thiem vs. Daniel Gimeno-Traver
21 Ivo Karlovic vs. Federico Delbonis
22 Viktor Troicki vs. Frances Tiafoe
23 Roberto Bautista Agut vs. Pierre-Hugues Herbert
24 Bernard Tomic vs. Damir Dzumhur
25 Andreas Seppi vs. Tommy Paul
26 Tommy Robredo vs. Michael Berrer
27 Jeremy Chardy vs. Ryan Shane
28 Jack Sock vs. Victor Estrella Burgos
29 Philipp Kohlschreiber vs. Alexander Zverev
30 Thomaz Bellucci vs. James Ward
31 Guillermo Garcia-Lopez vs. Janko Tipsarevic
32 Fabio Fognin vs. Steve Johnso

Women's Singles

1* Serena Williams vs. Vitalia Diatchenko
2 Simona Halep vs. Marina Erakovic
4 Caroline Wozniacki vs. Jamie Loeb
5 Petra Kvitova vs. Laura Siegemund
6 Lucie Safarova vs. Lesia Tsurenko
7 Ana Ivanovic vs. Dominika Cibulkova
8 Karolina Pliskova vs. Anna Tatishvili
9 Garbine Muguruza vs. Carina Witthoeft
10 Carla Suarez Navarro vs. Denisa Allertova
11 Angelique Kerber vs. Alexandra Dulgheru
12 Belinda Bencic vs. Sesil Karatantcheva
13 Ekaterina Makarova vs. Teliana Pereira
14 Timea Bacsinszky vs. Barbora Strycov
15 Agnieszka Radwanska vs. Katerina Siniakova
16 Sara Errani vs. Mayo Hibi
17 Elina Svitolina vs. Elizaveta Kulichkova
18 Andrea Petkovic vs. Caroline Garcia
19 Madison Keys vs. Klara Koukalova
20 Victoria Azarenka vs. Lucie Hradecka
21 Jelena Jankovic vs. Oceane Dodin
22 Samantha Stosur vs. Timea Babos
23 Venus Williams vs. Monica Puig
24 Sabine Lisicki vs. Aliaksandra Sasnovich
25 Eugenie Bouchard vs. Alison Riske
26 Flavia Pennetta vs. Jarmila Gajdosova
27 Alize Cornet vs. Kurumi Nara
28 Irina-Camelia Begu vs. Olga Govortsova
29 Sloane Stephens vs. Coco Vandeweghe
30 Svetlana Kuznetsova vs. Kristina Mladenovic
31 Anastasia Pavlyuchenkova vs. Magdalena Rybarikova
32 Anna Karolina Schmiedlova s. Julia Goerges

*Seedings of 2015 US Open

Venues – USTA Billie Jean King National Tennis Center in Flushing Meadows.

Courts used during US Open 2015 - Arthur Ashe Stadium, Louis Armstrong Stadium, Grandstand, Court number 4,5, 6, 7 ,8,9, 10, 11, 12, 13, 14, 15, 16, 17.

Time – The US Open is scheduled for 11 am local time (8:30pm IST, 4pm BST) start in the initial stages of the competition, though the start timings are subjected to change in the business end of the US Open.

Click here for the complete 2015 US Open Draw