The 31-year-old Australian had previously stood in 15 women’s ODIs, the first one in November 2016 between Australia and South Africa.

She was the first woman to stand in a men’s domestic fixture in Australia in her first List A match in Australia in 2017.

In December last year, she and her South Australian counterpart Eloise Sheridan became the first female umpires to officiate on-field together during a professional match in Australia when the Adelaide Strikers hosted the Melbourne Stars in the WBBL.

Polosak was exuberant at the impending milestone: “I am thrilled to be the first woman to stand in a men’s ODI and how far I have come as an umpire."

Oman had beaten Namibia by four wickets in their earlier game, thus finishing two points ahead of them at the top of the table.

But Namibia, who had already secured promotion to the new ICC Cricket World Cup League 2 for 2019-2021 along with Oman and the teams who finished third and fourth, United States and Papua New Guinea, had the final say.

With promotion came one-day international status.

The hosts won by 145 runs at Wanderers Cricket Ground in the capital city of Windhoek, with Oman collapsing to 81 all out after 29 overs in response to the Namibian total of 226-7, using all their allotted 50 overs.

Karl Birkenstock top-scored for the hosts with 61, and home bowler Jan Frylinck earned the man-of-the-match award after taking five for 13 in eight overs.

Canada and Hong Kong, who finished fifth and sixth in the round robin, will drop to the ICC Cricket World Cup Challenge League.

The third-place play-off final saw Papau New Guinea beat the United States by five wickets as they responded to the US total of 164 by reaching 165 for five after 33 overs, with Lega Siaka scoring 62.

Canada beat Hong Kong by five wickets in the fifth-place play-off.