Nice to see Connors out there again; not too bad for 59yrs old! It's got to be rough because he's playing 40yr olds....(tho at that age he was still on the ATP tour). He does look very fit; much more than Andre or Lendl in their on-court appearances.
I think the guys take it somewhat seriously....they are getting paid to put on a competitive show here. The "old" champions tour (pre-Courier) was pretty competitive as well. If they don't put in some effort, no one will buy the tix