Simona Halep, the best female tennis player at the moment, trains to keep her position at the hardest. 

Along with her coach, Darren Cahill, Simona trains hard for her actual position in WTA. This time, Cahill challenged her to hit the same spot 10 times, and if Simona manage to do it perfect, he promised her a prize.

She responded immediately: "Nutella pancakes!".

Her coach said he didn't belive she could do it, because she had a bad day, but when it came to see what happens when you challange the WTA leader, she did an amazing job!