The father of Paraguayan sensation Sergio Diaz will be at Stamford Bridge today for Chelsea's clash with Sunderland. The Mail on Sunday says Chelsea have invited Diaz Snr as they seek to steal a march on rivals for the Cerro Porteno striker's signature.

The 17 year-old has been tracked by Manchester United, Liverpool and Roma also.

Diaz made his first team debut at 15 and plays for Paraguay Under 20s.

The forward is considered one of the hottest talents in South America and is valued at £5million.

In detail:

Sergio Diaz: Why Liverpool, Man Utd and Barcelona are chasing the Cerro Porteno sensation