Bilic revealed that apart from Lionel Messi and Cristiano Ronaldo every player experience lulls in form.
Barcelona forward Messi and Real Madrid star Ronaldo are widely considered the two best players in the world.
“Some players experience lulls. Except for Messi and Ronaldo, such periods happen to everyone and they do affect the team,” Bilic was quoted as saying by Zaman.
Bilic underlined that his players are starting to feel the fatigue of playing so many games this season.
Beşiktaş have played the highest number of games n the Süper Lig due to their Europa League run.
The Black Eagles are also playing in a temporary home stadium as the Inönü is being rebuilt.
The Istanbul giants will play their remaining home games at the Osmanlı stadium in Ankara.
“We have played nearly 50 matches. Some players naturally get injured, but thankfully we are working with a full team right now,” he added.