Los Angeles Lakers duo Russell Westbrook and Avery Bradley have entered the NBA's health and safety protocols.

The Lakers cancelled practice on Tuesday after guard Talen Horton-Tucker was put into the league's coronavirus protocols.

It was revealed two days later that Westbrook and Bradley have joined Horton-Tucker, Dwight Howard and Malik Monk in entering the protocols.

With Westbrook and Bradley unable to travel for Friday's game against the Minnesota Timberwolves at Target Center, it has been reported the Lakers are set to sign Isaiah Thomas.

Two-time All-Star Thomas is to sign a 10-day contract to join a depleted Los Angeles roster under the hardship exemption, according to NBA insider Marc Stein and The Athletic's Shams Charania.

The 32-year-old point guard joined the New Orleans Pelicans on a 10-day contract last season, averaging 7.7 points in his three games.

Miami Heat stars Jimmy Butler and Bam Adebayo have been ruled out of Tuesday's scheduled showdown with the Philadelphia 76ers due to the NBA's health and safety protocols amid the coronavirus pandemic.

Butler and Adebayo were added to Miami's COVID-19 protocol list on Monday, joining team-mates Goran Dragic, Kendrick Nunn, Maurice Harkless, Udonis Haslem and KZ Okpala.

Heat guard Avery Bradley had been placed on the health and safety protocols list before Sunday's matchup against the Boston Celtics was postponed.

The coronavirus situation also saw the postponement of Monday's game between the New Orleans Pelicans and Dallas Mavericks, as well as the Celtics-Chicago Bulls encounter on Tuesday.

Miami are ninth in the Eastern Conference with a 4-4 record after reaching last season's NBA Finals, eventually beaten by the Los Angeles Lakers.

The NBA has postponed the Boston Celtics-Miami Heat showdown due to health and safety protocols amid the coronavirus pandemic.

Sunday's contest was set to go ahead, despite the Celtics missing seven players – including star pair Jayson Tatum and Jaylen Brown – because of COVID-19 protocols, and nine in total.

But the NBA announced the postponement just hours before tip-off after a Heat player reportedly returned an inconclusive coronavirus test, leaving Miami without the required eight players to play due to contact tracing.

Heat guard Avery Bradley (health and safety protocols) had been ruled out of the game earlier in the day.

The Celtics were set to have the minimum eight players available against the Heat after Javonte Green, Semi Ojeleye, Grant Williams, Robert Williams II and Tristan Thompson were listed as outs pre-game.

Injuries had already forced Celtics pair Kemba Walker (knee) and Romeo Langford (wrist) to miss the scheduled meeting.

It comes as COVID-19 outbreaks impact the NBA following a coronavirus-hit 2019-20 campaign in the United States.

Eastern Conference leaders the Philadelphia 76ers were depleted for Saturday's loss to the Denver Nuggets after Seth Curry tested positive for coronavirus.

Contract tracing seriously impacted Doc Rivers' 76ers, who were without Curry, Tobias Harris, Matisse Thybulle and Vincent Poirier, paired with injures to All-Star duo Joel Embiid and Ben Simmons.

Philadelphia were only able to dress eight players against the Nuggets, though Mike Scott was unable to play due to a knee injury.

The Celtics own a 7-3 record in the Eastern Conference, ahead of last season's NBA Finals runners-up the Heat (4-4).