Yoga is a beneficial practice for athletes, including pro footballers, as it helps improve flexibility, mobility, balance, and body awareness. Deep stretching poses can be particularly beneficial for footballers to enhance their performance and prevent injuries. Here are a few deep stretch yoga poses that can be helpful:

Downward-Facing Dog (Adho Mukha Svanasana): Start on your hands and knees, then lift your hips upward, creating an inverted V shape with your body. Press your hands firmly into the ground, lengthen your spine, and gently push your heels toward the floor.
Pigeon Pose (Eka Pada Rajakapotasana): Begin in a plank position, bring your right knee forward, placing it behind your right wrist. Extend your left leg behind you, keeping your hips square. Lower your upper body onto your forearms or the floor, and breathe deeply.
Standing Forward Bend (Uttanasana): Stand tall with your feet hip-width apart. Slowly fold forward from the hips, allowing your head and upper body to relax. You can bend your knees slightly if needed. Let your arms hang or hold onto your elbows, and breathe deeply.
Butterfly Pose (Baddha Konasana): Sit on the floor and bring the soles of your feet together, allowing your knees to fall out to the sides. Gently press your knees toward the floor, feeling a stretch in your inner thighs. You can fold forward to deepen the stretch.
Extended Triangle Pose (Utthita Trikonasana): Start in a wide-legged stance with your feet about 3-4 feet apart. Turn your right foot out to the side and extend your arms parallel to the floor. Reach forward with your right hand, then lower it to your shin, ankle, or the floor. Extend your left arm upward, creating a straight line from your left foot to your left fingertips.

Remember to always listen to your body and work within your comfort zone. If you're new to yoga or have any specific health concerns, it's recommended to consult with a qualified yoga instructor to ensure proper form and technique.