Cesc Fabregas (3) and Alexis Sanchez (2) dominated the scoresheet.
"Cesc adapted his play perfectly to the position of a false 9. He played an extraordinary game. He's an additional option that we have. But I'd also like to highlight Song's game. In fact, everyone played well," said Roura.
"The fact that he (Alexis) was able to score two and give two assists is important for him and for us."