To effectively counter an opponent with a strong backhand loop, consider implementing a strategy focused on disrupting their rhythm and positioning. Start by targeting their forehand side with varied shot placement and angles, forcing them to shift and potentially leaving their backhand less accessible. Use quick, deep slices or low balls to disrupt their timing and create opportunities for aggressive third-ball attacks. When engaging in rallies, mix in occasional top-spin shots to draw them into uncomfortable positions, especially wide to their forehand, thereby opening up space for counter-attacks. Additionally, consider employing a proactive approach by closing the distance when possible, applying pressure with fast, aggressive plays that limit their ability to set up and unleash their powerful backhand loop.