Effects of beetroot juice ingestion on physical performance in highly competitive tennis players - Lopez-Samanes, A.; Perez-Lopez, A.; Moreno-Perez, V.; Nakamura, F. Y.; Acebes-Sanchez, J.; Quintana-Milla , I.; Sanchez-Oliver, A. J.; Moreno-Perez, D.; Fernandez-Elias, V. E.; Dominguez, R. (Nutrients, 2020)