cea mai grea lovitura din tennis

exista o sumedenie de lovituri extrem de greu de executat:smash de rever cu spatele,printre picioare sau tweener marca federer,stop voleu etc. Care vi se pare cea mai grea lovitura din tenis?

https://www.youtube.com/watch?v=wUjtPBkkJ9g tweener

https://www.youtube.com/watch?v=u2vF9xnL-EU smash de rever cu spatele,backhand smash

https://www.youtube.com/watch?v=t1JJ2Znmnlo stop voley

https://www.youtube.com/watch?v=1RXe0OnkwRs&feature=related drop shot

https://www.youtube.com/watch?v=Y2qCtuKzK5I&feature=related diving shot