Oh gosh, that is nothing. It gets up to around 50 C around here easily, sometimes for days on end. It sometimes even feels hotter on some courts since they seem to soak up a lot of the heat.
Of course it's not very high, but the contrast with the constant cool days of 15'C makes it tough to adapt.
I'm sure cool daytimes in Arizona are rare in the tennis season, so you can get used to it.