Diomandes former coach reveals what makes Real Madrids blockbuster signing so special: Cant tell if hes right-footed or left-footedReal Madrid have made a huge investment in Yan Diomande, but those who watched the winger before his rise were already convinced that he had something special.The 19-year-old Ivory Coast international has completed his move from RB Leipzig to Real Madrid in a deal worth 125 million before potential add-ons, making him the most expensive signing in the clubs history.Diomandes rapid rise has been remarkable, as he only made his breakthrough at senior level with Leganes before moving to Leipzig.However, his performances in Germany turned him into one of Europes most wanted young attackers.Now, Borja Jimenez, who worked with the winger during his time at Leganes, believes Real Madrid fans are yet to see just how much talent their new signing possesses.Borja Jimenez explains why Diomande stands outJimenez spoke about Diomande on El Tertulin de los domingos on COPE (h/t Mundo Deportivo), explaining that the young winger could surprise a lot of people once they see him regularly.Hes a player many people dont know, having only seen highlights, but I think hes going to surprise a great many people with his audacity, he said.Real Madrid have paid an initial fee of 125 million for Diomande. (Photo by Maja Hitij/Getty Images)That confidence comes from personal experience, as Jimenez worked with Diomande when the player was still trying to establish himself, giving the former Leganes coach a close look at his ability before the winger became a major name.One of the qualities that impressed him most was Diomandes ability to use both feet naturally.Hes a player who stands out; you cant tell if hes rightfooted or left-footed when hes on the ball, Jimenez added.That is a particularly valuable quality for a modern winger. Diomande can attack defenders from different angles and does not appear restricted to one side of his game.Jimenez also highlighted his direct style and ability to take opponents on, stating,Hell bring a lot of verticality to the game, and hes brilliant at beating his man one-on-one.Diomande has already impressed coachesDiomandes ability to manipulate defenders is another aspect of his game that caught Jimenezs attention.Borja Jimenez has nothing but praise for the new Real Madrid signing. (Photo by Maja Hitij/Getty Images)He has the ability to stop that is, to bring the ball to a complete standstill and wait for the opponent to close him down, and from there he feints.That pause before accelerating is an important part of Diomandes game.Rather than simply relying on speed, he can slow the action down, wait for the defender to commit and then use his technique to create an opening.Jimenez actually saw this ability almost immediately after Diomande joined Leganes reserve team.The former coach recalled an incident from one of the youngsters early training sessions that left him struggling to understand why the winger was still playing at reserve level.Within 15 or 20 minutes of training, hed already shown us I couldnt understand what that player was doing in the reserve team.The quality on display was so obvious that the coaching staff eventually decided to remove him from the session.