Sentence:  There was no distracting Rosol's ice-calm as he killed the fifth set and match. Ace, cross-court forehand winner, ace, forehand winner – a blistering eighth game took him to 5-3 and informed Nadal precisely how <WSD>nerveless</WSD> the Czech was. 
Meaning of the word marked with <WSD> tags:  Devoid of nerves: calm, controlled, cool under pressure.