This is the 11972nd most frequent French word.
tennistiquement
"Relating to tennis."
The word 'tennistiquement' is used to describe an aspect related to tennis, in this case, her play style.
Tennistiquement, elle a un jeu agressif.
Tennistically, she has an aggressive play style.
Here, 'tennistiquement' provides a tennis-specific context to the reasoning for the mistake.
Cette erreur est justifiable tennistiquement étant donné les circonstances.
This mistake is justifiable tennis-wise given the circumstances.
In this sentence, 'tennistiquement' focuses the evaluation specifically on its tennis-related implications.