Marin, considered as one of the most dominating players in international badminton, said she might be back in February next year but wouldn't want to put a date on her return.
PV Sindhu sent a moving message of support to Carolina Marin after the Spain player was forced to withdraw from the Olympics due to injury.
PV Sindhu's arch-rival Marin suffered an Anterior Cruciate Ligament (ACL) tear in her left knee that will require surgery to heal.
The 25-year-old Indian, who had won the coveted World Championship gold medal here in 2019, couldn't match the speed and accuracy of Marin during her 12-21 5-21 defeat
In normal circumstances, the Spaniard would currently be gearing herself up to defend her crown at the Tokyo Games but due to the COVID-19 crisis, the showpiece event has been pushed to next year.
Carolina Marin defeated Tai Tzu Ying 14-21, 21-17, 21-18 to lift the China Open.
Defending champion Marin had ruptured the anterior cruciate ligament in her right knee while competing in the Indonesian Masters final on January 26 and has since been sidelined from the competition.
Carolina Marin faced a knee injury in January, and is now considering skipping the World Cup to participate in Olympics next year.
PV Sindhu feels she would have to give her 100 per cent in England in to win the women's singles title.
Saina Nehwal was trailing 4-10 in the opening game when Carolina Marin decided to withdraw from the contest.
Saina Nehwal won her first title of the year as Spain's Carolina Marin forfeited the finals after she suffered an injury in the very first set of the match.
The Thai seeded No. 6 in the tournament, dominated the match from the start, jumping to a quick 6-1 lead and never letting Marin back into the set.
Marin easily sealed the first game in 20 minutes with a measured return at the Indian's forecourt.
Top shuttlers including Olympic medallists PV Sindhu, Saina Nehwal, world champion Carolina Marin and former world no 1 Victor Axelsen will headline the players' auction.
The 23-year-old further asserted that though she gave her 100 per cent in the tournament, she would definitely work on her weak areas.
The Olympic silver medallist settled for another white metal following a 19-21, 10-21 loss to Olympic champion Marin of Spain.
PV Sindhu vs Carolina Marin Live Updates BWF Badminton World Championships 2018 women's singles final highlights
The 24-year-old from Spain clinched two World Championship titles, an All England title beside the Olympic crown all in a span of three years between 2014 to 2016.
Marin, cheered on by a vociferous home crowd, overcame a fighting Sun Ji Hun 13-15, 15-10, 15-9 to dash the hopes of Delhi Dashers in a gripping semifinal.
The Spanish left-hander proved too good for Nehwal as she won 15-5, 15-7 in a jiffy to add to the Warriors' woes.