In this task, you need to count the number of vowels (letters 'a', 'e', 'i', 'o', 'u') / consonants (all letters other than vowels) in the given sentence.
Sentence: 'against the green of a tennis court, a man in tennis whites looks to the side, an intent look on his face, as his hands hold and balance his racquet'. Count the number of consonants in the given sentence.