Simba beat Mighty Wanderers by one goal to nil in Lilongwe and Yanga drew one all in Gaborone, so both Tanzanian clubs go into the return legs in Dar es Salaam without a deficit.
Anicet Oura scored the only goal at the Bingu National Stadium in the second half.
Yanga rescue a point in stoppage time
Amseb put Gaborone United ahead in the first half and Seleman Mwalimu equalised for Yanga deep in stoppage time.
The equaliser sends Yanga home level.
The return legs are in Dar es Salaam
Simba host their return match at Uhuru Stadium and Yanga host theirs at the Azam Complex, both in Dar es Salaam next week. Aggregate scoring decides these ties.
The winners move into the second preliminary round. Neither tie is settled, so it is the second legs rather than these first legs that will decide whether Tanzania keeps two clubs in the Champions League beyond September.
Where to bet: CAF Champions League markets are priced in shillings at Betway and Premier Bet, both licensed by the Gaming Board of Tanzania, covering match result, both teams to score, over and under and qualification outrights. Deposits run through M-Pesa, Mixx by Yas and Airtel Money. A two legged tie prices the aggregate rather than the ninety minutes, so the qualification market and the match result market can move in opposite directions. Compare the two books on qualification before you stake. Our guide to the best betting sites in Tanzania covers licensing and payout times, and there is more in Tanzania soccer news from AXN Sports. 18+. Gamble responsibly.

