Ronny Deila has been named Scottish Premiership manager of the month after a fine October domestically for Celtic.
He received his Scottish Professional Football League award after the reigning champions returned to the top of the top flight ahead of Aberdeen.
Celtic had four straight league victories during October, concluding with a 3-1 win over the Dons to stretch their lead to six points.
Deila's side also defeated Hearts in the Scottish League Cup.
However, in the Europa League, Celtic were held to a 2-2 at home by Fenerbahce and lost 3-1 to Molde in Norway.
"Every game is important, but beating Aberdeen at home was even more so as it gives us an advantage in the league," Deila told league sponsor Ladbrokes.
"Nobody can take these points away from us now.
"We want to keep winning and keep developing, but it makes it even better if we can develop while already winning games and with a gap at the top of the table."
Deila singled out in-form striker Griffiths for praise.
"Leigh has developed a lot over the last 18 months," he said. "In the beginning, he wasn't playing regularly, but he has worked hard and is better now on and off the pitch.
"He was important at the end of last season, but he is even more so now and that's a credit to him.
"To have a player that scores in almost every game is what every team wants and he will be a big player for us this season and hopefully for many years to come."