For sale, my Tifosi Fototec Tyrant sunglasses, with GT fototec lenses and Iron colour frame. These are specifically for tennis or golf, as the lenses mute other colours; they really subdue the glare of the sun and really let the ball stand out against the sky and background.

Tifosi is an Italian company that specialise in making the best sports and outdoor activity eyewear on the market.

The TIFOSI Tyrant Series Sunglasses, Iron Frame, GT Fototec Lens   feature the Fototec lens with variable tint technology (T-V) which adjusts rapidly to changing light conditions for superior clarity and protection. In bright sun, microscopic photochromic particles embedded in the lens react to UV rays darkening the optics so you'll never squint. Then with cloud cover, the particles return to their previous state letting through more light, so the lenses automatically adjust (approx. 10 secs transition time) to the ambient light conditions.

These are pretty much as new, no scratches etc on the lenses as they are hardly worn as I spent most of my time playing indoors and didn't need them! Originally purchased for £80 from Tennis Warehouse Europe.
They come with a hard shell zippered case and a soft microfibre bag which doubles up as a lens cleaner.

More info on the glasses:

The Tifosi Optics GT lens tint features “object illumination,” which enhances your ability to pick up a ball in flight by providing a balance of target and background brightness. Whether you are in the outfield, at net or tee, the GT tint is designed to help keep your eye on the ball. 
Tifosi GT lenses offer 100% protection against harmful UVA/UVB rays.
The GT fototec lens means Golf/Tennis specific lens. This model comes with GT lens, designed specifically to help spot a ball in flight and to read surface contours and terrain breaks.

The lenses that Tifosi make are really something: Tifosi Optics sunglasses feature decentred shatterproof polycarbonate lenses to virtually eliminate distortion, give sharp peripheral vision, and offer 100% protection from harmful UVA/UVB rays, bugs, rocks, or whatever comes your way.
Tifosi frames are made from durable and flexible Grilamid TR-90 nylon, with hydrophilic rubber on the arms and nose pads for a more custom, comfortable, and no-slip fit.

OPTICALLY DECENTERED Optically decentred lenses eliminate distortion and prevent distracting magnification. Reflective lens coating reduces glare and decreases eye fatigue
High impact resistance: flex instead of shattering upon impact. Optical clarity
VENTED LENS Vented lenses increase airflow to help prevent fogging & to help keep you cool
UVA/UVB Protection All Tifosi lenses provide 100% protection from all harmful UVA & UVB light rays.
POLYCARBONATE LENS Tifosi lenses are all constructed from scratch resistant, shatterproof polycarbonate material
HYDROPHILIC RUBBER Hydrophilic rubber ear & nose pads increase their grip the more you sweat to prevent slipping.
ADJUSTABLE NOSE PADS  Fully adjustable nose pads allow a close fit, limiting slippage and increasing comfort & performance
GRILAMID TR-90 FRAME TR-90 is an incredibly light durable nylon material that resists chemical & UV damage

56 - 20% light transmission

These are possibly THE best tennis (or golf) glasses that you can buy, and are a game changer if you find yourself hitting with the sun in your eyes or trying to see the ball against the sun on your serve toss etc.
These would be great glasses for cycling, particularly as they are vented, shatterproof etc, in fact they are perfect for any outdoor activity, but obviously more centred on tennis or golf use.

I will post using a signed for and insured delivery service as soon as payment clears. Buyer welcome to collect from Leicestershire if preferred.
Many thanks for looking, any questions etc, please ask.