Even the Logo man for the Australian Open keeps his arm up!
What are the priorities of your tennis shot? It is recommended that they be consistency, placement, depth, spin and pace/power, and in that order! Most club and junior players believe that the quickest way to improve their level is to add pace to the ball. Note, pace is the last priority of the five. Watch the pros and notice what priorities they have for their shots. It appears that the one that demonstrates excellent placement and depth, without sacrificing consistency, is the more successful player.
When you play, be aware of your goals/priorities for each of your shots. If you find yourself losing, evaluate your consistency. Remember, spin allows your powerful shots to be more consistent.
Another priority for the day – stay warm and be safe during the blizzard!