Dani Ceballos missed his penalty as Liverpool beat Arsenal in a shoot-out at the end of a 5-5 EFL Cup draw at Anfield.
Gabriel Martinelli's two goals helped Arsenal to a comfortable victory over Standard Liege on Europa League matchday two.
In just his second Arsenal start Bukayo Saka got a goal and two assists. The 18-year-old winger is already targeting more.
After Dominik Kohr was sent off, Bukayo Saka cut loose with a goal and an assist to lead Arsenal to a 3-0 win over Eintracht Frankfurt.
Joe Willock, who has been with Arsenal since the age of four, has agreed to a new contract at Emirates Stadium.
Arsenal claimed three points in their first game of the new Premier League season as a defensive error gifted them a goal.
There was no place for new signings Nicolas Pepe and David Luiz in Arsenal's starting line-up for their Premier League opener at Newcastle.
Laurent Koscielny added to Unai Emery's defensive concerns with an injury setback before Arsenal's FA Cup win at Blackpool.
Arsenal youngster Joe Willock hit a first-half brace at Blackpool but was denied a hat-trick during the closing stages of the FA Cup tie.
Joe Willock's double and a late third from Alex Iwobi saw Arsenal breeze into the fourth round of the FA Cup at Blackpool's expense.