Manchester City midfielder Mateo Kovacic admits the title run-in will be a test of nerve.
The champions kept the pressure on rivals Arsenal and Liverpool at the Premier League summit with an emphatic 5-1 win over relegation-threatened Luton on Saturday.
City now have just six games remaining of what has been an enthralling title race.
Kovacic, who scored City's second goal in a commanding display at the Etihad Stadium, said: 'It's amazing, it's entertaining. Three amazing teams doing great.
'It will be tough until the end and let's see who will have the strongest nerves until the end.