Cristiano Ronaldo scored as Al-Nassr won an AFC Champions League match which was delayed by an hour because of a missile alert.
Ronaldo scored Al-Nassr's second goal as the Saudi Pro League champions beat Uzbekistan's Neftchi Fergana 3-1 on Monday.
Kick-off was delayed after Saudi Arabia's Civil Defence issued a safety warning just 15 minutes before the scheduled start time in Riyadh, the capital city which has been the target of missiles fired from Yemen-based Houthis.
Following attacks on Riyadh's airport, explosions were heard in the capital on Monday night. The Saudi-led military coalition said a ballistic missile had been intercepted and destroyed.
Future sporting events could be affected by the regional conflict, including Formula 1 races in Qatar and Abu Dhabi.
Once Al-Nassr were able to get under way, Ange Postecoglou's team went ahead through Angelo in the 33rd minute and Ronaldo doubled their lead before half-time.
Uzbekistan champions Neftchi pulled a goal back, but they were reduced to 10 men after 65 minutes and an own goal 13 minutes later sealed a first Group B victory for the hosts.
Ronaldo also scored on Friday when making his return to club football, having left the Portugal national team camp halfway through the Nations League break out of frustration at limited playing opportunities.
- Ronaldo scores on Al-Nassr return after Portugal fallout
- Saudi minister vows 'serious response' to Houthi attacks on airports
'F1 pressing ahead with Qatar & Abu Dhabi events'
F1 is pressing ahead with plans to run the races in Qatar and Abu Dhabi. It's fair to say this is causing some disquiet in the paddock, even if few - if any - are voicing it publicly.
The argument to press on as planned is that the Qatar and Abu Dhabi governments are saying there is no reason for F1 not to go, there have been no attacks on civilian infrastructure since the spring, and the countries are operating on a business-as-usual basis.
On top of that, the UK Foreign Office is not advising against travel, instead warning that there is "a risk of more attacks and unforeseen escalation in the region", and that "British nationals currently in the Middle East should be prepared for possible flight cancellations, periodic airspace closures, and potential travel disruption".
As Mercedes team boss Toto Wolff put it on Sunday: "Whether Qatar and Abu Dhabi happens at the moment, everybody says so, and so we need to go the direction of this is six more races to go."
If there is an escalation in the Middle East, for example after the US mid-term elections on 3 November, and the races have to be cancelled at late notice, then Imola in Italy is being prepared as a back-up option for the weekend of Abu Dhabi.