Kellermann signed for the Spireites last week on a free transfer following a trial and was immediately loaned out to Tamworth for an initial 28-day period to get some minutes under his belt.
And the midfielder introduced himself to the Lambs supporters with a volley from the edge of the box into the top corner which put them ahead against Lowestoft Town in the Southern Football League Premier Central encounter.
Kellermann played 58 minutes as Tamworth ran riot to win 6-1 and record their first victory of the season.
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The 25-year-old also got 90 minutes in the tank in the previous game, a 1-1 draw at home to Coalville Town.
Elsewhere, Rowley, who is loan at King’s Lynn Town, played 75 minutes of their 1-0 home defeat to Southend United on the first day of the National League season.
Speaking after the game, Linnets manager Ian Culverhouse said Rowley was ‘very good’ against the Shrimpers.
“He found good pockets,” Culverhouse explained. “He is only going to get better and fitter – he hasn’t played games for a long time so he will be a tired man, promising signs there.
"We just need to get the ball into him a little bit more on the half turn and he will be alright at this level.”
Tamworth are next in action away at Redditch United on Saturday, while King’s Lynn travel to Yeovil Town and then host Chesterfield on Bank Holiday Monday.