Riyad Mahrez picked up from where he left off last season with a stunning goal for Leicester City in their penalty shoot-out win over Celtic on Saturday.
The Foxes winger opened the scoring in the International Champions Cup encounter at Celtic Park with a trademark finish, cutting inside before picking out the top corner.
Reports in the British and French press have linked Mahrez with a move to Arsenal, but after the game Ranieri said he remains confident the Algeria international will stay at the King Power Stadium.
The 2015/16 PFA Players' Player of the Year scored 17 goals and provided 11 assists as Leicester won the Premier League trophy last season.
They opened preparations for their title defence with a 2-1 victory over Oxford United on Tuesday, but Saturday's fixture against Celtic marked the start of a run of glamour ties for Ranieri's men.
They face Paris Saint-Germain next Saturday in California before taking on Barcelona in Stockholm four days later.
After that, they head to Wembley to take on Manchester United in the Community Shield.
Hit play on the video at the top of the article to watch Mahrez's goal against Celtic