Uganda recorded their first Africa Cup of Nations victory in 41 years as they pulled off a surprise win over DR Congo in Group A in Egypt.
The Cranes' 23-year-old forward Patrick Kaddu opened the scoring, heading in from a corner after a well-timed run to the near post after 14 minutes.
Strike partner Emmanuel Okwi's glancing header from a free-kick then doubled the lead three minutes after half-time. Egypt defeated Zimbabwe 1-0 in the tournament's opening match on Friday.
Uganda lost all three group matches in 2017, in what was their first Africa Cup of Nations appearance since finishing runners-up in 1978.
In Cairo on Saturday, the lively Kaddu had two great opportunities to add to his tally with first-half headers, while team-mate Khalid Aucho saw a powerful long-range effort saved by DR Congo's Ley Matampi.
Substitute Jonathan Bolingi had the best opportunity for two-time champions DR Congo - whose starting XI included West Ham's Arthur Masuaku and Everton's Yannick Bolasie - but the Antwerp forward's header struck the top of the crossbar.
Next, Uganda will face Zimbabwe on Wednesday while DR Congo take on Egypt later that day.