Lamine Yamal's first-half double helped Barcelona maintain their winning start to the La Liga season with a 4-1 thrashing of Catalan rivals Girona.The Spain teenager put the visitors in control and goals from Dani Olmo and Pedri after the break wrapped up a comfortable win before the closing stages saw Cristhian Stuani net a consolation for Girona and Barca’s Ferran Torres sent off.Victory leaves Barca four points clear at the top of the table with five wins from five and their attention now turns to Thursday’s Champions League opener against Monaco.The win also saw Barca gain revenge for their two 4-2 defeats at the hands of surprise package Girona last season.Atletico Madrid remain in second after Conor Gallagher netted his first goal for his new side in their 3-0 victory over Valencia.The England midfielder, who joined the Spanish giants from Chelsea last month, opened the scoring in the 39th minute at Metropolitano Stadium before Antoine Griezmann and Julian Alvarez extended the hosts’ advantage after the break – the ex-Manchester City forward also with his first goal for Atleti.Celta Vigo secured a 3-1 win over Valladolid, who went down to 10 men after Mario Martin was sent off in the 81st minute.Athletic Bilbao were also left short-handed after Mikel Jauregizar’s 56th-minute sending-off, but prevailed 3-2 over hosts Las Palmas.Denzel Dumfries netted a late equaliser as Serie A champions Inter Milan avoided a shock defeat at neighbours Monza.Dany Mota had put Monza on course for an unlikely victory when he headed the hosts ahead against the run of play with nine minutes remaining at the U-Power Stadium.Yet Inter, after meeting stubborn resistance from the hosts all evening, finally found a way through in the 88th