The Scottish tennis star's loss to Swiss legend Roger Federer was seen by 16.9m (67.9%) for 5 minutes from 6pm.
BBC One's entire coverage of the match, including build-up and post-match analysis, averaged a colossal 11.44m (58.2%) between 1pm and 6.40pm.
A bumper day for sport for the corporation was capped by the F1: British Grand Prix racing off with 2.64m (25.7%) between 12.15pm and 1pm on BBC One, and 3.24m (19.4%) from 1pm and 3.30pm.
Later in primetime, hit Swedish crime drama Wallander returned with 6.42m (27.5%) between 9pm and 10.30pm, while Countryfile (6.33m/26.8%) and Antiques Roadshow (6.4m/26.9%) held up well earlier on.
Meanwhile on ITV1, Superstar remained steady with 3.11m (13.1%) at 8pm (+1: 165k/0.7%) thanks to a Coronation Street lead-in. The Nation's Favourite Number 1 Single followed Superstar with 2.53m (10.8%) at 9pm (+1: 165k/0.7%).
Elsewhere, Big Brother rallied to 1.38m (5.7%) in the 9pm hour, adding 116k (0.6%) on timeshift. Once Upon a Time maintained a solid 1.09m (4.6%) from 8pm (+1: 136k/0.6%).
BBC Two aired World's Most Dangerous Roads (1.41m/5.9%) and Mock the Week (1.27m/5.9%).
Across primetime, BBC One led with 27% versus ITV1's 14.4% (+1: 1%). Channel 4 earned third place with 7.8% (+1: 1.6%), ahead of BBC Two's 4.8%, and Channel 5's 4.3% (+1: 0.5%).
New Sky1 drama Sinbad launched with an impressive 1.06m (5.7%) from 7pm, while Family Guy took 969k (4.9%) and 952k (4.3%) for its new editions on BBC Three.
BARB ratings data supplied by Attentional