Sport Which Requires Most Teamwork Which Sport Requires The Most Mental Skill/talent?

Which sport requires the most mental skill/talent? - sport which requires most teamwork

All athletes in all sports requires a great mentality. You need to keep fit, hard and will not lose his head. In some sports it is easier to not get with a good spirit, and asphyxia can not be so bad. Thus, in this sport is more important tough-minded?