op seed Simona Halep dominated Lesia Tsurenko to reach the quarter-finals of the Qatar Open. The 2014 champion in Doha raced to a 5-0 lead in the opening set before taking it 6-2 with her third break of serve. Halep then faltered to go a break down in the second before recovering to win five straight games - and the match - 6-2, 6-3. The Romanian will overtake Petra Kvitova - who chose not to defend her title in Doha - at number two in the world if she wins the tournament. But first she will need to get past ninth seed Julia Goerges in the last eight.