Fourth-round clashes for British players
- Andy Murray (1) v Benoit Paire, Centre Court (not before 4pm)
- Johanna Konta (6) v Caroline Garcia (21), Court 1 (4pm)
Friday's schedule in Madrid
Men's quarter-finals
Novak Djokivic (1) v Marin Cilic (9) from 2pm UAE time
Roger Federer (4) v Dominic Thiem (5) from 7pm
Stefanos Tsitsipas (8) v Alexander Zverev (3) from 9.30pm
Stan Wawrinka v Rafael Nadal (2) from 11.30pm
Women's semi-finals
Belinda Bencic v Simona Halep (3) from 4.30pm
Sloane Stephens (8) v Kiki Bertens (7) from 10pm
Grand slam winners since July 2003
Who has won major titles since Wimbledon 2003 when Roger Federer won his first grand slam
Roger Federer 19 (8 Wimbledon, 5 Australian Open, 5 US Open, 1 French Open)
Rafael Nadal 16 (10 French Open, 3 US Open, 2 Wimbledon, 1 Australian Open)
Novak Djokovic 12 (6 Australian Open, 3 Wimbledon, 2 US Open, 1 French Open)
Andy Murray 3 (2 Wimbledon, 1 US Open)
Stan Wawrinka 3 (1 Australian Open, 1 French Open, 1 US Open)
Andy Roddick 1 (1 US Open)
Gaston Gaudio 1 (1 French Open)
Marat Safin 1 (1 Australian Open)
Juan Martin del Potro 1 (1 US Open)
Marin Cilic 1 (1 US Open)
Auron Mein Kahan Dum Tha
Starring: Ajay Devgn, Tabu, Shantanu Maheshwari, Jimmy Shergill, Saiee Manjrekar
Director: Neeraj Pandey
Rating: 2.5/5
TRAP
Starring: Josh Hartnett, Saleka Shyamalan, Ariel Donaghue
Director: M Night Shyamalan
Rating: 3/5
What is graphene?
Graphene is extracted from graphite and is made up of pure carbon.
It is 200 times more resistant than steel and five times lighter than aluminum.
It conducts electricity better than any other material at room temperature.
It is thought that graphene could boost the useful life of batteries by 10 per cent.
Graphene can also detect cancer cells in the early stages of the disease.
The material was first discovered when Andre Geim and Konstantin Novoselov were 'playing' with graphite at the University of Manchester in 2004.
How to protect yourself when air quality drops
Install an air filter in your home.
Close your windows and turn on the AC.
Shower or bath after being outside.
Wear a face mask.
Stay indoors when conditions are particularly poor.
If driving, turn your engine off when stationary.