After an incredible season with Liverpool, there had been fears over whether the 27-year-old would be fit for the tournament in Brazil.
Images of Suarez being carted around in a wheelchair after undergoing keyhole surgery were broadcast around the world last month, raising concerns over his World Cup participation.
"Hello to everyone, I wanted to tell you that my knee is getting better," Suarez said in video for 888poker.
"I feel very good, I have to go day by day, but everything is on the right way. I wanted to thank you all for the support I received and now my mind is focused on the World Cup."