Spain boss Vicente del Bosque believes Manchester City striker Alvaro Negredo has a lot more to offer.
Despite scoring in Spain's last two qualifiers against Belarus and Georgia, Del Bosque believes the 28-year-old is not playing at the level he should be.
Negredo, who left La Liga side Sevilla in the summer, is yet to hold down a first team starting spot at the Etihad Stadium.
The forward has scored four goals in seven games for the Citizens so far this season - but is yet to hit the dizzying heights of his time at Sevilla, where he scored 69 goals in 139 appearances.
Del Bosque, speaking to reporters after Spain qualified for next summer's World Cup in Brazil, said: "He [Negredo] is a striker who doesn't play as well as his ability permits. He still hasn't discovered his full potential."
The 62-year-old manager was particularly impressed with Barcelona midfielder Andres Iniesta's display.
“He [Iniesta] is a great role model and we took him off in the last few minutes because he deserved an ovation from his home crowd," added Del Bosque.
“It's practically a routine for us because we keep on qualifying for tournaments but we have to remember that it's an important success, because Spain were qualifying for tournaments long before me and my team arrived.
“It hasn't been easy, we had problems against smaller teams and we competed with a very good France team for the top spot, but we've managed to do it. We have qualified with austerity."