rafa nadal got his clay court season off to a perfect , confidence-boosting display from the world no 5 .
he did n't unleash the full power of his forehand but played sensible , measured tennis and made only five unforced errors in the match .
his talented 21-year-old opponent showed flashes of attacking flair , including one outrageous half-volley forehand winner , but was never able to put enough balls in court to trouble the great spaniard .