Elsewhere, last season's fourth-placed side Lazio enjoyed a 2-0 away win over Cagliari with goals from Manuel Lazzari and Ciro Immobile.
Acheampong scored a goal in the 81st minute, but it was ruled out for offside.
Both teams created and missed chances in the first half and made life a little easier in the season, with no one breaking the deadlock.
Dortmund responded with furious attacks but Gikiewicz was alert enough to keep out promising chances from Thomas Meunier and Erling Haaland before the break.
Guangzhou Evergrande are chasing their ninth CSL title having dropped just eight points. But Fabio Cannavaro's side still have problems to solve on the defensive end, where ageing full-backs Li Xuepeng and Zhang Linpeng have raised questions whether they can stay healthy and consistent throughout the next stage.
Chelsea fought back after the break: Mason Mount gave Chelsea a lifeline in the 55th minute, Hudson-Odoi then scored with 20 minutes left to play and Tammy Abraham scored the equalizer in the 94th minute.
As rumors speak of Bayern having lost the race for their main right-back target Sergino Dest (Ajax) against Barcelona due to a better offer from the Spaniards, tensions have increased around the reigning German champions.
Inter coach Antonio Conte started new arrival Aleksandar Kolarov but benched fellow summer signings Arturo Vidal and Achraf Hakimi, while Romelu Lukaku partnered Lautaro Martinez up front with Christian Eriksen behind them.
News of the transfer comes in the wake of Manchester City's 5-2 thrashing at home to Leicester City in the Premier League on Sunday afternoon. The game is the first time a side coached by Pep Guardiola has conceded five goals at home and once again served to highlight the problems at the heart of his side's defense.
Local hero Daniil Kvyat gave the Russian fans in attendance something to cheer with eighth place ahead of AlphaTauri teammate Pierre Gasly, while a difficult race for Alex Albon saw the Red Bull driver finish tenth.
Mexico will meet the Netherlands in Amsterdam on October 7 and Algeria in the Hague six days later.