Do you ever get that feeling that there is someone lurking behind you? Recently, tennis legend and coach Boris Becker shared a picture of Team Djokovic during their first practice session for the 2015 Barclays ATP World Tour Finals in London with two-time grand slam Swiss champion Stan Wawrinka photobombing in the background.

The picture, which Becker shared on Facebook, seemed quite ordinary at first glance. However, a closer look will show Wawrinka in the back with his hands up, one still holding a racket. Becker tagging the World No. 1 Serb and Wawrinka in the picture also helped notice the photobomber in the picture.

“Team Novak Djokovic first practice in London with Stan Wawrinka, lol,” Becker, who officially joined Marian Vajda, Miljan Amanovic, and Gebhard Phil-Gritsch in the beginning of the 2014 season, wrote as the photo’s caption.

Djokovic won last year’s edition of the season-ending men’s tennis tournament after Roger Federer pulled out citing an injury ahead of their finals clash at the O2 Arena. The 28-year-old was the first to qualify this year after reaching the semifinals of the Roland Garros in June.

Meanwhile, the finals draw ceremony for the season finale tournament took place at City Hall on Thursday evening. The top-ranked Serbian is looking to win a fifth title in London. He leads Group Stan Smith alongside Federer, Tomas Berdych and Kei Nishikori.

Wawrinka leads Ilie Nastase Group alongside Andy Murray, who is looking to win his first Barclays ATP World Tour Finals trophy. They are joined by Spanish tennis stars Rafael Nadal and David Ferrer.

Djokovic will begin his London campaign against eighth-seeded Nishikori on Nov. 15. Wawrinka will play Nadal in his first match on Nov. 16. For more information about the Order of Play, visit ATPWorldTour.com or the official tournament website at Barclaysatpworldtourfinals.com.

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