In a match where off-season loanee Dani Ceballos excelled for Arsenal in midfield, Aubameyang provided the cutting edge in a dominant second half.
Mesut Ozil and Sead Kolasinac were left out because police are investigating "further security incidents" two weeks after the players fought off two knife-wielding men.
The 24-year-old Nicolas Pepe is moving to the Premier League in a transfer deal worth a reported 80 million euros ($89 million).
While Arsenal look to make their third and a record signing, Manchester United are finally cashing in on improving their defence and midfield for the new season.
With the final month remaining for the summer transfer window, the Premier League clubs have started losening their wallets as they splurge on the best in Europe.
Arsenal's star footballers Sead Kolasinac and Mesut Ozil were unharmed from a carjacking attack by two armed robbers.
Arsenal's star footballers Sead Kolasinac and Mesut Ozil were unharmed from a carjacking attack by two armed robbers.
James Olayinka, Bukayo Saka and Gabriel Martinelli scored for the Gunners in their 3-0 win over the Colorado Rapids on Monday.
Jose Antonio Reyes, who played for clubs like Arsenal, Real Madrid and Sevilla, died in a tragic car accident.
After Chelsea beat Arsenal 4-1 in the Europa League final, Eden Hazard confirmed that he is likely to leave the club this summer, amid widespread speculation about a move to Real Madrid.
Henrikh Mkhitaryan will not travel with Arsenal's squad for the Europa League final due to political tensions between Armenia and Azerbaijan.
Arsenal's path to the final was more straightforward, beating Valencia 4-2 thanks to a hat trick from Pierre-Emerick Aubameyang to complete a 7-3 win on aggregate.
Arsenal will take a 3-1 lead into the second leg against Valencia after coming from behind while Chelsea scored the potentially crucial away goal in Germany to extend his team's unbeaten run.
Since back-to-back wins over Napoli, the second best team in Italy, in the quarterfinals of the Europa League, Arsenal's players have lost three straight games in the Premier League.
The defending champions will retain the title if they win their final two games, at home to Leicester and away to Brighton.
Manchester City defeated Manchester United 2-0 and returned to the top of the table with three games to go while Wolves handed Arsenal a 3-1 defeat at the Molineux.
Liverpool beat Cardiff City 2-0 while Everton humiliated Manchester United 4-0 and Arsenal went down to Crystal Palace 2-3 at home.
Chelsea beat Slavia Prague 4-3 on aggregate over the two legs while Arsenal got the better of Napoli 3-0 to make the Europa League last four for the second straight year.
In other Europa League games, Benfica beat Eintracht Frankfurt 4-2 after Joao Felix's hat trick while Valencia secured a 3-1 away win at Villarreal.
At 36 years and 233 days, Phil Jagielka became the oldest scorer in the Premier League this season when he netted from close range in the 10th minute at Goodison Park.
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