Joao Fonseca's start to the 2026 ATP Tour season has been delayed by a lower back injury.
The Brazilian withdrew Sunday from the Brisbane International presented by ANZ and will be replaced by a lucky loser.
The 19-year-old former Next Gen ATP Finals champion is at a career-high No. 24 in the PIF ATP Rankings. This time last year, he won the ATP Challenger in Canberra before winning through qualifying at the Australian Open and upsetting then-World No. 9 Andrey Rublev to reach the second round.
Fonseca is next scheduled to compete at the Adelaide International, which begins 12 January.