Coverage of the league phase match from Emirates Stadium. Martin Odegaard scored a 75th-minute winner in Arsenal's first game of this year's competition as the Gunners won 1-0 away at Napoli. Their visitors lost their opening fixture as Real Betis came from behind in the second half to earn a thrilling 3-2 victory, with the Republic of Ireland's Troy Parrott scoring a 53rd-minute winner.