Tiger Woods's ex-wife Elin Nordegren reportedly discovered that her husband was having affairs by impersonating him in text messages.

The former Swedish model divorced the world number one in 2010 after it emerged that the golfer had allegedly cheated on her with a number of different women.

According to the Daily Beast, Nordegren found out about his relationship with Rachel Uchitel by reading text messages exchanged between the two on his phone.

It is believed that the former model looked through Woods's phone after he had passed out from sleeping pills that he had taken.

Reports have claimed that Nordegren impersonated her then-husband via a text message to Uchitel on Thanksgiving night.

Woods, who is now in a relationship with Olympic skier Lindsay Vonn, eventually publicly admitted to his infidelity.