The new tennis season starts this week with the inaugural United Cup in Australia.
The mixed team event, running from 29 December to 8 January, will feature many of the world's top players and offer a chance to gauge their form before the opening Grand Slam of the year - the Australian Open - starts on 16 January.
Before the first ball of the season is hit, we consider what the big tennis questions for 2023 might be and ask BBC tennis correspondent Russell Fuller for his verdict.
Will Nadal's body hold up?
Rafael Nadal won two Grand Slam titles in 2022, taking his tally to a men's record 22 major singles trophies.