Sri Lankan team members wear masks during the New Delhi Test, Lyon's stunning catch at the Adelaide Oval and some of the action from basketball, world skating and rugby this week.
Wide receiver J.J. Nelson of the Arizona Cardinals runs onto the field for introductions before the NFL game against the Los Angeles Rams at the University of Phoenix Stadium in Glendale, Arizona on December 3, 2017.
Sri Lankan captain Dinesh Chandimal, is seen interacting with his teammates, while wearing a mask, during the second day of the test match against India in New Delhi on December 3, 2017. This was the first time that a Test match was stopped for around 20 minutes due to the rising pollution levels.
Lyon's stunner: Nathan Lyon pulls off a blinder of a catch off his own bowling, turning to his wrong side, to get rid of Moeen Ali during the third day of the second Ashes Test match at Adelaide.
Grounds crew struggle to control the cover for the pitch as rain begins to fall during the second day of the Ashes cricket test match between England and Australia in Adelaide on December 3, 2017.
New Orleans Pelicans guard Jrue Holiday goes to the basket against Denver Nuggets center Mason Plumlee and guard Malik Beasle, in the first half of an NBA basketball game in New Orleans on December 6, 2017.
Ken Crawley of the New Orleans Saints breaks up a pass intended for Devin Funchess of the Carolina Panthers during the second half of a game at the Mercedes-Benz Superdome in New Orleans, Louisiana on December 3, 2017.
Carly Marguiles of the United States competes in a qualifying round of the FIS Freeski World Cup 2018 Ladies' Ski Halfpipe during the Toyota U.S. Grand Prix in Copper Mountain, Colorado on December 6, 2017.