I cant find any Tennis Option, what activity do you use for Tennis or which Option
I use treadmill then edit the activity changing to tennis. I changed my data screens to show timer, HR zone, HR for #1 and screen #2 showing time, temp and steps with slow scroll. This give me what I'm looking for during the match. Afterward the synced distance is waaay under reported. A recent match had me at 5560 steps and with my walking stride of 2.36 that would put me at nearly 2.5 miles but the activity recorded .39 miles. I used to use a Vivoactive HR and that would post more realistic numbers.