Not me of course!

Had to put up with the sun in my face for a couple of the coaching sessions today.

I mean it would not be fair to put the client that end.

But for those of you who are having to move indoors to play, here are a couple of thoughts and tips, especially if you usually play out doors.

Lighting:
More often than not, indoor courts are poorly lit! There are some exceptions to be sure, but overall, the level of light is very low. Thus, visibility becomes a real factor.
Temperature:
I have never... I repeat never... have played on an indoor tennis court where the temperature was not low! Generally, temps range from around the low 50's to the low 60's Fahrenheit. These lower temperatures decrease ball speed a bit, but usually exaggerate the lower bouncing quality of most indoor courts.But then I must say that most of my tennis indoors, was in an aircraft hanger where it was warmer outside.
Court space:
If you play on most outdoor tennis courts, there is plenty of room between courts. This may or may not be the case with respect to indoor tennis courts. Regardless of the amount of space between courts, most indoor facilities have large "nets" that prevent balls from going inadvertently into adjacent courts. So, the bottom line is that when you play indoors, you really don't have the same "running room" from side to side that you have when playing outside.
Ceilings:
For outdoor courts, the sky is literally the limit. But when playing indoors, there is always a ceiling. Some facilities have very high ceilings which permit some very high lobs. Most do not. Indeed, "bubble" structures can have very low ceiling... especially when you are playing on a court that is next to one of the curved walls. Apart from the height of an indoor court's ceiling, there is the problem of "color." Generally, it is very difficult to track a lob and hit an overhead smash when playing indoors. The effect is very similar to what one experiences when playing outdoors on a very cloudy day. It is very easy to lose "sight" of lobbed balls.

Sound:
With the exception of carpeted facilities, most indoor courts are full of potentially distracting noises. Heating fans that go on and off can be annoying. Sometimes there is a sort of "echo" effect in some indoor facilities. Big, first serves can almost sound like a gun going off in some indoor courts. Chatter from adjacent courts usually is more pronounced indoors. All of these place demands upon one's ability to be able to block out distractions and maintain proper focus. Although this is a greater challenge indoors, it can often time help players who are easily distracted to learn to become more focused when playing outside.
Night:
Here, indoor and outdoor courts are fairly similar. When playing outdoors under the lights, ball visibility becomes more difficult. The same is true with indoor courts. If you have trouble seeing the ball in low light you are probably going to have some difficulty playing indoors at any time of day. But, this effect will be much more pronounced when playing at night. The good news is that sunglass manufacturers have generated a whole new line of eyewear that is specifically designed to help one see the tennis ball better in poorly lit situations. I won't plug any specific brand, but I do encourage the reader to shop around and try out some of the products available... they do help!

But to avoid all this, just pack up and move to Tenerife, and you only have to put up with the sun in your face for half a match!

But a couple of things to think about -

 Wear the right shoes.
Sounds a bit crazy, but one needs different shoes for hard courts, for clay courts and for carpeted surfaces. Each, surface has its own level of "slipperiness." You will need the right footwear to play well!
Bring plenty of warm clothing.
You will probably not need to be competing in a warm up, but you will definitely need to bring warm clothing to an indoor facility. Start your pre-match warm ups wearing sweats or a warm up suit. You will probably not need these during your match, but always bring a heavy towel to put around you during changeovers.
Bring plenty of fluids.
When playing indoors it is easy to forget to hydrate your body during play. Yet, your body perspires significantly when playing indoors. It just isn't as conspicuous as when playing on a hot day outside. Without proper hydration you run the risk of cramping.