Tello's late effort did justice to the score as Betis had twice hit the woodwork earlier in the game through Guido Rodriguez and Sergio Canales.
Meanwhie, Xiralijan Muhtar, also a member of the Chinese national squad, announced his move to Nanjing Monkey Kings.
However, any concerns over a processional race were dispelled in a surreal opening few laps.
BERLIN, Sept. 12 (Xinhua) -- Leipzig eased 3-0 past second division outfit Nuremberg thanks to the goals from Amadou Haidara, Yussuf Poulsen and Hwang Hee-chan whereas Eintracht Frankfurt needed two second-half goals to overpower resilient third division side 1860 Munich 2-1 in the opening round of the German Cup on Saturday.
The Yorkshire side's return to the top-flight after a 16-year absence got off to the worst start when defender Robin Koch was penalized for a handball and Mohamed Salah slotted home the resulting penalty kick.
This win came weeks after another Ugandan star Joshua Cheptegei shattered Ethiopian legend Kenenisa Bekele's 16-year-old 5,000m world record at the restart of the coronavirus-hit Diamond League in Monaco, France.
The Chinese Football Association (CFA) announced on August 26 that the 2020 China League One season will kick off on September 12.
There has also been increased government support to athletics. For instance the government, despite a COVID-19 lockdown, facilitated the travel of a team of athletes, headed by Cheptegei, to travel to Monaco for the Diamond League.
"We (the Chinese women's volleyball team) hope that the Olympic Games will be held successfully because we have been fighting for this for four years," said the 25-year-old.
Evergrande had a good opportunity just four minutes into the game but Ai Kesen hit chance off target.
Real Sociedad were disappointed to lose Odegaard to Real Madrid but have done well to sign veteran David Silva and their youth system can be relied on to provide a string of impressive local talent.