Debutant Arthur scored a stunning goal and Malcom converted the decisive spot-kick as Barcelona surrendered a two-goal lead but survived to beat Tottenham 5-3 on penalties following a 2-2 draw at the International Champions Cup.
Barca were cruising at half-time thanks to Munir El Haddadi and Arthur, who put the LaLiga champions in a commanding position in Pasadena, California on Saturday.
A €40million signing from Gremio, 21-year-old Brazilian midfielder Arthur curled a shot past Spurs goalkeeper Paulo Gazzaniga approaching the half-hour mark at the Rose Bowl.
Arthur's memorable strike followed Munir El Haddadi's opener 14 minutes earlier, however, Tottenham dominated the second half and scored two goals in as many minutes with 15 minutes remaining through Son Heung-min and substitute Georges-Kevin N'Koudou.