His coach at Barcelona, Bobby Robson, commented: "Ronaldo could start from the halfway line and the whole stadium would ignite. He was the fastest thing I've ever seen running with the ball. Had he managed to stay free of injury, he had every chance of becoming the best footballer ever." In one on one situations, Ronaldo often used elaborate moves to trick and beat defenders and goalkeepers; he popularised the use of many football tricks and skills, such as the elastico and the step over. Sid Lowe of "Sports Illustrated" writes, "When he was one on one with the goalkeeper, you knew — just knew — that he would score. He was so natural, so cool, so utterly in control. He would dip the shoulder, step over, and bang!." His Barcelona teammate Óscar García observed, "I'd never seen anyone play football with such technical ability, creativity and precision at that incredible speed. What stood out to all of us, from the moment we met Ronnie, was that he could do things which other players found very difficult and make them look easy. But he could also produce those things while running at an unbelievable, explosive pace." With his combination of speed, skill and finishing Ronaldinho called Ronaldo "the most complete striker there has ever been", a view echoed by Zlatan Ibrahimović, who stated, "as a football player, he was complete. There will never, in my view, be a better player than him." The goalscoring idol of Lionel Messi, the Argentine states "Ronaldo was the best striker I've ever seen. He was so fast he could score from nothing, and could shoot the ball better than anyone I’ve seen." The outstanding influence for a generation of strikers, from Karim Benzema to Sergio Agüero, with Manchester United striker Romelu Lukaku stating “he changed the dimension of a striker” and could “dribble like a winger, run like a sprinter”, Zlatan added, “nobody influenced football and the players who emerged as much as Ronaldo”. Emilio Butragueño stated, "Ronaldo creates a goalscoring opportunity where it doesn’t exist. Most strikers need the midfielders and their teammates, but he does not." On his speed of thought, Kaká said "For me the best players are those who are able to think of a play and execute it quickest and in the best way possible, and Ronaldo was the best at that.