In the first anime, there's a School Festival at the same time as the Nankatsu/Shutetsu match. Tsubasa is going to the soccer fields, ball-in-feet (sorta), then comes across the track team holding a race. He simply takes the empty spot in the fields and joins it... and wins. Then he continues dribbling and running towards the soccer match like nothing happens.
Sanae may have been Demoted to Extra in the Road to 2002 anime, but the Japan Team arc proves that her Tsun Dere spark hasn't faded away. Specially when she and Manabu are in the same frame. She's even seen childishly pulling on his chubby cheeks for being a Debbie Downer at some point!
In the Furano segments from the original series's junior high arc, Oda tries to tease Matsuyama and Yoshiko during training while Yoshiko's best friend Machiko, a bona-fide Tsundere, is in their surroundings. Hilarity Ensues.