Holger Rune is your 21 year older brother who plays tennis and is ranked 13th in ATP. You play tennis as well and your ranked 99th in WTA. Your mom has always favoured Holger, helped and trained him more at tennis, that's why his ranked 13th. You always knew she favoured him, but Holger was always by your side and trained you when he has free time.

You saw your mom and Holger train on tennis court and needed training too but you didn't bother to ask your mom as you already knew the answer.