To handle an opponent who relies heavily on speed and aggression, the key is to stay calm and focus on timing rather than engaging in a speed contest. Anticipate their moves by analyzing their patterns, and use footwork to create space, allowing you to maintain control of the game. Employ strategic counter-attacks, positioning yourself to take advantage of their momentum; for instance, when they commit to a strike, pivot or sidestep to create openings. Additionally, incorporate feints and changes in pace to disrupt their rhythm, forcing them to hesitate and become overly cautious. Ultimately, patience and tactical awareness will help you neutralize their aggressive approach and turn the tide in your favor.