I don't want a complete shift to it. I'm still a fan of the dreaded "human element". I would like to see a tennis system, perhaps where a manager can challenge five (or some other arbitrary number) ball/strike calls per game.
I agree. The tennis system seems to work well. These are the player challenge rules at Wimbledon:
"Players have unlimited opportunity to challenge, but once three incorrect challenges are made in a set, they cannot challenge again until the next set."
http://www.wimbledon.com/en_GB/scores/challenge/Maybe managers could have up to 5-6 challenges, but lose a challenge every time they are incorrect. With the pitch tracker system, you'd think the rulings would be faster than on other types of challenges.
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