The Kruger sisters, Zoe and Isabella made a strong start in the Lagos Open, an ITF $25 000 Transition Tour event in Lagos, Nigeria on Wednesday.
Isabella stunned Ukraine's Valeriya Strakhova 3-6 6-0 6-4 to knock the top seed out in the first round earlier in the day.
Zoe joined her sister in the round of 16 as she saw off a spirited challenge from Tunisian Chiraz Bechru 6-4 6-4 to advance.