Usage of the word "clinical".

What does clinical mean here( in the following examples) ? I am unable to accept or understand this word in the context of these paragraphs :

"Australia's batsmen, barring Simon Katich, may have struggled on the first day but their bowlers were clinical in routing Rajasthan Cricket Academy's Centre for Excellence for 122 on the final day of their warm-up match in Jaipur. Five of the six bowlers used, Mitchell Johnson being the exception, picked up wickets and the game was called off after RCA were dismissed about an hour after lunch. "

(Quoted from http://www.espncricinfo.com/indvaus2008/content/story/371524.html)

Another example is : "Rohan Bopanna and debutant N Sriram Balaji were clinical in routing their rivals as India sealed the Davis Cup Asia/Oceania Group I tie against Uzbekistan by taking an unassailable 3-0 lead, in Bengaluru on Saturday."