Rossi finished the forefront of the race at the Assen circuit on Saturday (29/06/2013) evening hrs. The Italian rider ahead of Marc Marquez and Cal Crutchlow.
"I'm happy for Valentino," said Lorenzo in the MotoGP official website.
"More than two years without a victory for her weight. So, I'm happy for my partner in the garage," he added.
"After the tests in Aragon, I think he's made some progress, and here he is maximizing the opportunity," said Lorenzo.
Lorenzo himself still take part in the race despite recently undergoing surgery after suffering a broken collarbone. He was able to grab fifth.
Valentino Rossi in Dutch MotoGP race 2013
Rossi ended a winless run of nearly three years when he won the Dutch MotoGP at Assen.
Rossi wins first MotoGP race since 2010
Imperious Valentino Rossi dominates at Assen
Extra motivation for Valentino Rossi
Rossi wins in Assen as Lorenzo takes fifth with broken collarbone