The Gunners beat Tottenham Hotspur in the third round of the Capital One cup in midweek and then followed that up with a 5-2 win over Leicester City at the Kingpower Stadium on Saturday.
It is a much-needed turnaround from Arsene Wenger’s side, who had lost their last two games in all competitions before these wins, and Mertesacker believes that the confidence is flowing back into the side.
“We were quite happy after the win in midweek. We took some of that confidence with us today and you could see that,” he told Arsenal.com.
“There is a little room for improvement but I think we should take more confidence into the game on Tuesday in the Champions League [against Olympiacos]. Obviously it is very tight but we want to continue next weekend against Manchester United, too.”
'More than four goals is something very special'
The Gunners looked shaky at the back throughout the game against Claudio Ranieri’s side, with the likes of Jamie Vardy and Riyad Mahrez causing numerous problems to Mertesacker and his defensive colleagues.
The focus though, was firmly on Arsenal’s attacking talents, with Alexis Sanchez coming away from the game with a hattrick to return to fine form following a slow start to the season for the Chilean.
Striker Theo Walcott was in similar fine form, scoring the equaliser after Vardy had opened the scoring, while he was also a consistent danger with his clever running and all action performance.
Mertesacker said that scoring more than four goals is something special, but they did struggle defensively.
“We struggled defensively but I’d say we got back to our striking force and more than four goals is something very special,” he added.
“At times we lacked defensive stability but that is normal at Leicester. It was good for me to get some game time. I still lack a bit of fitness but it was good today. I say we deserved that especially after the second half.”