Borna Coric says he's been working on sharpening his serve and forehand.
Looks like there is power in practice.
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Watch Coric speed into the doubles alley driving this forehand winner down the line in dispatching qualifier Andrea Arnaboldi, 6-4, 6-1, in his Estoril opener.
The sixth-seeded Coric meets Brazil's Rogerio Dutra Silva next.
If the seeds hold true to form, Coric would face second-seeded Nick Kyrgios in the quarterfinals.
Photo credit: Millennium Estoril Open