WARSAW: Former tennis World No.2 Agnieszka Radwanska has given birth to her first child. Radwanska made the announcement on her Instagram handle and shared the first photos of her son Jakub. Her husband Dawid Celt, who was also Radwanska's hitting partner during her days as a player on the WTA tour, also shared a photograph of the couple's newborn son. "Jakub is already with us," he posted on Twitter with a photo of a tiny hand. IANS