Serbian pin-up Ana Ivanovic said today she wants to seek Roger Federer's advice on staying at the top after failing to maintain her position at the summit of women's tennis.

Ivanovic briefly became No 1 last year before a form slump saw her drop to No 5 in the world, while Federer held the men's top ranking for a record 237 weeks before being deposed by Rafael Nadal last August.