Sohrab is an MBA student and son of a city-based businessman.
The 22-year-old Sania and Sohrab (23) will exchange rings at 8.30pm at a posh city hotel tonight.
A blog for all the fans of India's teen tennis sensation Sania Mirza [Latest News, Pics, Photos, Interviews, Wallpaper]
A second man has been detained after professing his love for Indian tennis star Sania Mirza at her Hyderabad home.
Ajay Singh Yadav told the police that he had been in love with Ms Mirza - ranked 85th in the world - for five years and wanted to marry her.
On Wednesday another man, Mohammad Ashraf, was arrested after threatening to kill himself if Ms Mirza did not marry him. Both men are in custody.
The tennis player is to be engaged to a family friend on Friday.
Security has been tightened at Sania Mirza's bungalow in the upmarket Banjara Hills area of Hyderabad.
The police said Ajay Singh, from Noida in Uttar Pradesh, arrived in the city in the morning and rushed to Banjara Hills, saying he wanted to meet the tennis player.
When he did not go away despite warnings, the police took him in to custody.
"I have loved her for the last five years, and want to marry her," Mr Singh said, remaining cool and composed.
Based on an identity card he carried with him, the police identified him as a student at the Dronacharya College of Engineering in Noida.
It was a repeat of Wednesday's drama, in which Mohammed Ashraf, an engineering student from Kerala, tried to enter Ms Mirza's house and threatened to commit suicide if her engagement was not cancelled.
Mr Ashraf, a resident of Manjeri in Malappuram, said he wanted to "propose" to Ms Mirza. He said he fell in love with her two years ago, when he watched her playing tennis in Bangalore.
The Banjara Hills Police charged Mr Ashraf with offences including trespass, criminal intimidation and uttering words or making gestures outraging the modesty of a woman. He was sent before a local court, which remanded him in custody for 14 days.
Ajay Singh will also appear in court and be sent to the same jail where Mr Ashraf is lodged.A young Indian man turned up at the home of tennis star Sania Mirza and threatened to kill himself if the tennis player did not marry him.
Mohammad Ashraf told Imran Mirza, Sania's father, that the tennis star could not marry anyone else as she "was born for me".
He also demanded that her engagement with family friend Sohrab Mirza, scheduled for Friday, be cancelled.
An alarmed Imran Mirza called the police who have taken him into custody.
He has been produced in court and remanded for a fortnight.
Mirza, 22, is one of the top ranking players. She ranks 85 in the world.
'Threatening'
In his complaint to the police, Mr Mirza says Mr Ashraf claims to be in love with the tennis star ever since he saw her playing a match in Bangalore two years ago.
Mr Mirza has also complained that the youth was sending text messages and making threatening calls to his daughter for some time.
Mr Ashraf arrived at Ms Mirza's home in Hyderabad city's upmarket home in Banjara Hills area on Tuesday evening accompanied by his friend Devadeesh Mohanty.
"How can you engage Sania to another person when she was born for me?" Mr Ashraf is reported to have asked the tennis player's father.
"He was threatening to commit suicide if Sania did not marry him," Mr Mirza told the police.
The two men have been arrested and have been charged with trespass and creating a nuisance.
Mr Ashraf has been identified as a civil engineer from Bangalore.
Police say they have contacted Bangalore police to find out whether Mr Ashraf is mentally sound.