Yes, it may roll as well. In this instance, a roll would likely be caused by an uncoordinated stall. This is the dreaded stall/spin accident. Here's what happens:

You abort and pull up. You forget to add power and the airplane begins to stall. As this happens, you use the ailerons to bank right slightly. When you bank right the left aileron lowers and the right rises. This also means that the left side of the wing has a higher AOA than the right side. Let's apply this information to our situation here. You've now essentially stalled the left side of the wing more than the right side. Guess what happens, despite your command to bank right the airplane will dip left. In a panic you increase the amount of right aileron. What happens? Your airplane dips left even more! By this time it's too late because you are low to the ground and your beloved airplane cartwheels into the ground. You've essentially entered into a spin. It just can't become a fully developed spin since the airplane hits the ground beforehand. This is another reason why we use the rudder to correct for these things.

Again, the Decathlon isn't going to attack you unless you screw up pretty badly, so don't worry too much. Despite it not being a trainer and being aerobatic, it's still a relatively forgiving airplane.