The 26-year-old double Olympic medallist, who last competed in Brussels in the Diamond League Final in September, will spend 31 days in the South African city.
The 75-year-old coach, who guided Chopra to a historic gold at the Tokyo Olympics, a silver at the Paris Games this year, and several other medals, had earlier expressed his inability to continue
The 75-year-old Bartonietz has cited his age and family commitments to part ways with Chopra.
The 26-year-old Chopra returned home after becoming the first Indian track-and-field athlete to claim successive Olympic medals by adding a silver in Paris.
The 26-year-old is back in the country after winding up his season with a second-place finish at the Diamond League finale in Brussels.
On Saturday, Chopra came agonisingly close to winning the Diamond League crown before missing it by a single centimeter to finish as runner-up for the second consecutive year with a throw of 87.86m
Neeraj Chopra missed out on the top spot this year by just 1 cm as Anderson Peters from Grenada took the Diamond trophy with an 87.87m throw on the night in Belgium.
Sable finished 14th in the overall Diamond League standings with three points he garnered from two meetings.
The season finale will be a two-day affair on September 14 and 15 in Brussels. Chopra accumulated 14 points from his two second-place finishes in the one-day meets held in Doha and Lausanne.
India's Javelin star Neeraj Chopra won't be taking part in Zurich Diamond League with his spot in the final all but confirmed after a 2nd place finish in Laussane
Chopra won a silver medal in the Paris Olympics with a throw of 89.45m earlier this month while the gold went to Pakistan's Arshad Nadeem
For Neeraj Chopra, the only milestone left is the elusive 90m mark and it's only a matter of time before he hits it.
Neeraj Chopra's 89.49m throw earned him second place at the 2024 Lausanne Diamond League, but he missed the elusive 90m mark again, finishing behind Anderson Peters, who secured the top spot
Anderson Peters finished second, while Julian Weber finished on third spot. Check Neeraj Chopra's event highlights from Lausanne Diamond League 2024 here
While Neeraj Chopra has been identified as the highest-valued non-cricketer among Indian sportspersons, Manu Bhaker is also finalising big deals
Lussane Diamond League 2024 LIVE TIMINGS: Neeraj Chopra will be competing in first international event after winning Silver at Paris Olympics at 11:30 PM IST. Jio Cinema will live stream the event
Nursing a long-standing groin injury, Chopra claimed a silver medal in the recently-concluded Paris Olympics, having won a historic gold in the Tokyo edition of the Games three years ago.
Neeraj Chopra has been chasing that milestone for years and the wait got longer when his only legal throw of 89.45m got him a silver at the Paris Olympics earlier this month.
Earlier in the day, India's Olympic medal winners were also invited as a special guests at the Red Fort
A family source told PTI that he has left for Germany and is unlikely to return to India for at least one month. Indian Olympic Association sources also confirmed that Chopra has left for Germany.