'Please be OK': NBA viewers rocked by 'scary' incident

Boston guard Kemba Walker has been diagnosed with concussion-like symptoms and taken to a hospital for further evaluation after colliding with a teammate in the NBA.

Walker and Semi Ojeleye collided late in the second quarter of Boston's game against Denver, with Walker striking Ojeleye's abdomen area head-first and going down on to the court in a heap.

Play was stopped as medical personnel from both teams tended to the star guard who was prone on the floor for several minutes.

A brace was placed around his neck to stabilise the area and he was strapped to a backboard before being placed onto a gurney and wheeled off the court.

Kemba Walker was taken to hospital after suffering a serious head injury. Pic: NBC Sports

Players, fans and officials all looked in a genuine state of shock and concern as Walker was stretchered off the court.

He had remained almost motionless for several minutes on the floor as a sombre silence fell over the crowd.

Prayers for Walker's wellbeing immediately started filtering in on social media from concerned viewers.

Without their star point guard, Boston weren't able to get the win and lost 96-92.

Ben Simmons stars in Sixersโ€™ win

On a Friday of 10 NBA games, Ben Simmons registered a triple-double of 10 points, 10 rebounds and 13 assists as Philadelphia handed San Antonio their eighth successive loss.

Patty Mills scored five points to go with three rebounds and four assists in 26 minutes of court time for the Spurs.

The 76ers won their third straight game but San Antonio drop to a 5-11 record and are on the longest skid since head coach Gregg Popovich took over in 1996/97.

Elsewhere, Andre Drummond had 23 points and 15 rebounds, helping Detroit to a 128-103 win over the Atlanta Hawks.

The Pistons led 76-57 at halftime and they reached 100 points with more than five minutes remaining in the third quarter, capitalising on their highest-scoring first half since 1983.

Bradley Beal had 30 points and 12 assists as the Washington Wizards rallied to defeat the visiting Charlotte Hornets 125-118.

In Oklahoma City, Anthony Davis scored 24 of his 33 points in the second half to help the Los Angeles Lakers beat the Thunder 130-127.

Davis also had 11 rebounds and seven assists, and LeBron James added 23 points and 14 assists. The Lakers have won six in a row to improve the best record in the NBA to 13-2.

Also on Friday, Luka Doncic continued his terrific start to the season and scored 30 points and provided 14 assists in Dallas's 143-101 win over Cleveland.

Other winners on Friday were Brooklyn over Sacramento, Miami over Chicago and Utah over Golden State.