The gross spend was 90 per cent higher than the previous record of £430m in 2018 and almost triple the previous January window (£295m).
The Boston Celtics have won the past nine matchups between these two sides, including a 4-0 sweep in the first round of the 2022 playoffs.
Arsenal completed the shock signing of Jorginho from Chelsea as Premier League clubs once again shattered the record for transfer spending in the winter window.
Newcastle United became the first team to make the Carabao Cup final, with their 3-1 aggregate win in the semi-final over Southampton.