1. Preheat the grill to medium-high heat.
2. Pat pork tenderloin dry with paper towels.
3. Sprinkle pork evenly with salt and pepper. Wrap pork in pancetta, with slices slightly overlapping.
4. Place pork on grill rack coated with cooking spray; cover. Grill 18 minutes or until a thermometer registers 145°, turning occasionally to brown all sides. Let pork stand 10 minutes before slicing.