Hani Alnakhli of Saudi Arabia broke his own discus F33 world record on the opening day of action at the World Para Athletics Grand Prix at the Rades Athletics Stadium in Tunis.
Alnakhli smashed the record by throwing 30.09 metres, 59 centimetres further than his previous best, set at the corresponding event back in 2015.
Poland's Paralympic Games bronze medallist Anna Trener-Wierciak was the star performer on the first day of competition in the Tunisian capital as she claimed two gold medals.
The 26-year-old triumphed in the women’s long jump T12/20/37/38 competition with a leap of 4.64m, which earned her a total of 885 points.
The Polish athlete returned to the track later on in the evening to win the 100m T36/37/38 in a time of 14.16sec.
The host nation are fielding a strong team on home soil, including all five reigning Paralympic champions, with double Rio 2016 gold medallist Raoua Tlili impressing on day one.
Tlili proved too strong for the rest of the competing athletes as she won the women's shot put F41 with a best effort of 9.70m.
The three-time Paralympic champion led home a one-two for the Tunisian team as Samar Ben Koelleb did enough for silver by throwing 8.59m.
There was further success for Tunisia out on the track as Bilel Aloui dominated the 800m T13/38/44 as he clocked 1min 56.75sec to take gold.
Yassine Gharbi then repeated the feat over the same distance in the T54 classification with a time of 1:50.03.
Saudi Arabia earned double gold in the sprint events as Ali Alnakhli crossed the line in 12.38 to reign supreme in the men's 100m T37 classification.
His team-mate Nour Alsana completed the 200m T44/45 in 24.72 to add to the considerable Saudi Arabian haul.
Nearly 190 athletes from 13 countries are participating at the event in the Tunisian capital, scheduled to conclude on Saturday (April 15).