Kiwi twins Jake and Zane Robertson will race for the first time over 5000m on Sunday (NZT) and both have vowed to secure qualification in that event for next month's World Championships.
The African-based brothers last faced each other more than a year ago but will meet on the startline at the KBC-Nacht meeting in Heusden, Belgium this weekend.
There the 23-year-olds will be searching for a time fast enough to earn a ticket to Moscow to race in the 5000m, though Jake will already be on that plane having already secured a spot in the 10,000m.
His aim on Sunday is to achieve a world championship double, while brother Zane is seeking a shave one second from his personal best to ensure it will be a family affair in Russia.
That personal best came in Stanford in April, where he ran 13:21.15 to finish just 1.15 seconds outside the B standard, but Zane believed he was better positioned to attack the qualifying time on Sunday.