With the Rio Olympics just around the corner, many of the top track and field athletes are heading to London this weekend to take part in the Anniversary Games.
The event which doubles as a Diamond League meeting takes place at the Olympic Stadium on Friday and Saturday, and will see the likes of Usain Bolt, Jessica Ennis-Hill and Mo Farah competing.
The event gives Britain's Rio-bound athletes a great opportunity to lay down a marker ahead of the Olympic Games, and offers fans an insight into how the top names are performing at the most important time in the season.
Bolt leads Friday's superstar lineup heading to London
As the sport's biggest name, Usain Bolt will grab much of the attention ahead of his return to the track following the hamstring injury he picked up at the Jamaican trials.
Competing in Friday's 200 metre race, against the likes of Alonso Edward (Panama) and Christophe Lemaitre of France, Bolt still needs to prove his fitness to the Jamaican selectors to confirm his place in the Olympic squad.
Earlier in the evening, 12 men who have run sub-10 seconds in their lifetime will compete over 100 metres in semi-finals and a final, with France's Jimmy Vicaut going into the Games as favourite.
Jessica Ennis-Hill will compete in the 100metre hurdles alongside fellow Brit Tiffany Porter, and the three members of USA's Olympic squad for this event - Brianna Rollins, Kristi Castlin and Nia Ali.
Another British multi-eventer Katarina Johnson-Thompson will take part in the High Jump against three-time European champion Ruth Beitia, while Charlie Grice is included in the start-list for the men's 800m and will be up against Botswana's Nijel Amos who is in need of some form ahead of Rio.
Eilidh Doyle continues to improve and will hope to eak out another victory in the 400m hurdles against Denmark's European champion Sara Petersen, while Anyika Onuora gets a chance to prove the British selectors wrong when she faces Christine Ohuruogu in the 400 metres.
Asher-Smith and Farah top Saturday's bill
The second day of competiton gives the female sprinters their chance to take to the track.
One of Team GB's brightest prospects Dina Asher-Smith goes in the 100 metres alongside fellow Brits Desiree Henry, Asha Philip and Daryll Neita, in an event which includes two-time Olympic champion Shelly-Ann Fraser-Pryce from Jamaica.
In the 200, Jodie Williams will be hoping for a strong showing when she goes up against the likes of Shalonda Solomon (USA) and Dutch superstar Dafne Schippers, while Jack Green and Sebastian Rodger will face American duo Kerron Clement and Michael Tinsley as well as Puerto Rico's Javier Culson in the men's 400m hurdle event.
Ennis-Hill and Johnson Thompson return to the stadium to take part in the Long Jump on day two alongside fellow Brit, Shara Proctor, and elsewhere Holly Bradshaw will look to keep up with Cuba's Yarisley Silva and Greece's Katerina Stefanidi in the Pole Vault.
The meeting is then bought to a close with the men's 5000m, which the home crowd will hope sees victory for Mo Farah against a field which includes America's Bernard Lagat.