Alina Petras – WTCA – Women's Tennis Coaching Association
Tennis - Vierumäki
Long Island Tennis Magazine November / December 2015 by United Sports Publications - Issuu
Manhasset Girls Repeat as Nassau County Champions – Long Island Tennis Magazine
Lahden Tenniskerho on X: "Tänään vierailemme treenaamassa Vierumäellä. Vauhdista vastaa Alina Petras. #vierumäki #alinapetras #tennisvalmennus http://t.co/xhDuQT44Xr" / X
Zenniz | Helsinki
Guidebook to using Zenniz game-tracking technology in tennis coaching - Theseus