Chris Evans and Alex Jones's hour-long show, shunted to BBC Two in favour of the tennis, plunged to 1.92m (9.3%), its lowest ever audience.
Aired on BBC One, Murray's victory over Ivan Ljubicic, in contrast, scored 6.45m (28.7%) between 7pm and 10pm, peaking with an impressive 8.1m (34.3%) as the match drew to a close.
BBC Two's normal programming was also affected. The Kennedys at 9pm drew a modest 1.35m (5.8%), a far cry from its opening audience last week, while U2 at Glastonbury rocked just 1.14m (5.4%) at 10pm - collecting a further 888k (5.4%) on BBC Four from 10.30pm.
With EastEnders also moved to BBC Two, averaging only 5.4m, A Question of Sport netted 1.57m (6.6%) in its ordinary 8.30pm slot.
Over on ITV1, Love Your Garden interested 2.98m (13.2%) at 8pm, and Paul O'Grady Live slipped to 2.75m (11.9%) in the 9pm hour, adding an insignifcant 116k on +1.
Meanwhile, Channel 4 was hit particularly badly at 9.30pm when the tennis peaked, as Claudia Winkleman's comedy talkshow King Of... grabbed 873k (3.7%), a substantial 600k loss on its first edition. 177k watched an hour later on timeshift.
Elsewhere in the Channel 4 schedule, Come Dine with Me served up a 1.08m (4.8%) average at 8pm (+1: 250k), 8 Out of 10 Cats amused 1.3m (5.6%) at 9pm (+1: 243k) and 1.24m (6.7%) were entertained by Alan Carr: Chatty Man at 10pm (+1: 168k).
Unlike the other terrestrial broadcasters, Channel 5 was mostly solid. Eddie Stobart: Trucks and Trailers pulled in 1.28m (5.5%) at 8pm, and Law & Order had 1.01m (5.4%) at 10pm.
However, the second episode of Castle mustered 1.19m (5.1%) in the 9pm hour, losing half a million fans.
Overall, BBC One topped primetime with 27.1%, ahead of ITV1's 18.2% (+1: 0.4%), Channel 4's 4.5% (+1: 0.8%), and Channel 5's 4.2%.
BARB ratings data supplied by Attentional