Technical ability is the how well players can execute skills on the ball such as passing, shooting, ball control, first touch...etc according to certain references that have come to be defined as the perfect way to execute those skills like how to execute a half-volley, or first time control or long pass..etc For example, Ramires does not have 'traditional' goo technical ability but he can still execute stuff, even at full speed but in his own style. (Tbf, Ramires is an exception to the rule because he was never part of an academy when he was young). Naturally, any player at this level must have good technical ability, but the players that have overall world class technical ability in our squad are for me Mata, JT, Lampard, Luiz, and to a lesser extent Oscar and Cole. Hazard has world class technical ability when it comes to ball control and dribbling, but I can't say the same for his passing. Mikel has world class technical ability when it comes to passing, but I can't say the same about his shooting and dribbling. PS: For all his faults, Torres still has excellent technique on the ball.