Repetition is necessary for deliberate practice. Repetition leads to memory and automation, and automation conserves willpower and frees attention for other things. Thus, an experienced player can focus on the opponent, not technique.
Roy F. Baumeister and John Tierney. 2011. Willpower: Rediscovering the Greatest Strength. Penguin
Geoff Colvin. 2008-10-21. Why Talent is Overrated. CNN Money
Atul Gawande. 2009. The Checklist Manifesto. Metropolitan Books
Shunryu Suzuki. 1970. Zen Mind, Beginner’s Mind. Wheatherhill
Gary Wolf. 2008-04-21. Want to Remember Everything You’ll Every Learn? Surrender to This Algorithm. Wired