Caricature of Swiss tennis player, Roger Federer.

Pencil sketch of German tennis player, Sabine Lisicki.

Pencil drawing of German tennis player, Boris Becker.

Ink drawing of retired American professional boxer, Mike Tyson.

Ink drawing of Chinese basketball player, Yao Ming. On July 20, 2011, Yao announced his retirement from basketball.

Ink drawing of retired American tennis player, Andy Roddick. He's a former World No. 1 and won 32 singles titles including a Gram Slam Title (US Open) in 2003.

Ink drawing of Belgian professional tennis player, Kim Clijsters.

Clijsters is a former world no. 1 in both singles and doubles. She won 41 WTA titles, 3 ITF titles and 4 Grand Slam titles.

Ink drawing of American tennis player, Andre Agassi.

He's former World No. 1, winning 60 ATP titles including 8 Grand Slam titles (4 Australian Open, 2 US Open, 1 French Open and 1 Wimbledon. He won a gold medal at the Olympic Games in 1996).

Ink drawing of Portuguese football/soccer coach, José Mourinho.

Ink drawing of American swimmer, Michael Phelps.

He's the most decorated Olympian of all time with 22 medals.

Ink drawing of Jamaican sprinter, Usain Bolt.

He's a five-time World and four-time Olympic gold medalist, holding the records of 100m, 200m and 4x100m relay.

Ink drawing of Serbian tennis player, Ana Ivanovic.

Ink drawing of Swiss tennis player, Roger Federer.

Ink drawing of Belarussian tennis player, Victoria Azarenka.

Ink drawing of Portuguese football player, Cristiano Ronaldo.

Ink drawing of Russian tennis player, Maria Sharapova.

Portuguese football player.

The sketch was painted with a round hard edged brush. A round soft edged brush was used to do some blending. The blend mode of the sketch layer was then set to multiply and the color layer was added beneath it. Some highlights were added on a top layer with its blend mode set to screen.