He added: "They are all big stars here, I've seen them play of course and I've played against Neymar in Brazil - he is a sensational player and a great representative for the Brazil team."
Barca were unsurprising 3-0 winners over Elche in their season opener last week, with Villarreal also claiming three points with a 2-0 success at Levante.
The Yellow Submarine followed that up with a 4-0 win over Astana at El Madrigal in the second leg of their Europa League play-off.
Having also won 3-0 away from home, they now boast a record of nine goals scored and none conceded this season.
Reflecting on the psychological boost afforded by the European triumph, manager Marcelino Garcia Toral said: "It is very important for the entire group to be back into Europa League and it is a nice challenge for everyone.
"We are very happy to be in the group stage and playing as well as the team have done so far.
"All the players have been at a high level and therefore have achieved great results and you cannot ask for more."